Bombfrog DW-15 V2 User Manual

DW-15 (V2)

1.0 Introduction

Thank you for choosing the BOMBFROG DW-15 (V2) watch. This
watch contains major functions as below:

 Current time, alarm, chronograph, timer, pacer, dual time;
 Pedometer, calorie counter, sport mileage;
 Weather forecast, thermometer, altimeter, barometer,

compass;

Detailed specification please see attached appendix.
In order to operate and perform the watch well, please follow the

below instructions:

 Read the instruction carefully and keep it well before usage;
 Avoid using the watch in extreme conditions;
 Do not disassemble the watch yourself;
 Clean the watch with one soft cloth, do not use the organic

solvent;

 Keep the watch away from the magnet or magnetic objects;
 Keep the watch in one dry place when not in use.

2.0 Button Introduction

LIGHT(A)：switch on EL back light for 3 seconds/zero-clear/delete data;
MODE(B)：function convert/press and hold will start setting;

ALTI-(C)：altimeter mode/decrease;
COMP(D)：compass mode;
BARO+(E)：barometer mode/increase.

3.0 Function Diagram

4.0 Current Time Mode—Function Display

Function Display

Top: weather forecast and press E button for 2 seconds will convert
the following 4 functions,

 Weekday
 Temperature
 Altitude tendency chart
 Sea level air pressure tendency chart

Medium: time

Bottom: date
NOTE: If you want to achieve one accurate atmosphere temperature,
you need to take the watch down for 20-30 minutes, in order to
eliminate the influence of body temperature.

4.1 Current Time Mode-Weather Forecast

Weather Forecast

With the change of air pressure before, the watch will achieve the
corresponding weather forecast, but it will be different from the
actual weather;

How to Display the Weather in Future

The watch will display the weather in future by the following 4 icons:
 Sunny

 Partly cloudy
 Cloudy
 Rainy

This function only could display under current time and dual time
mode.

4.2 Current Time Mode-Current Time Setting

How to Set the Current Time

1. Under time mode, press and hold B button until the flashing icon
“SET” and second digit appear;

2. Press B button to convert;

3. When the digit of second is flashing (selected), press E/C button to
clear the digit to “00”.

4. When the other digit of minute, hour, year, month or day is flashing
(selected), press E/C button to increase/decrease the digit (press and
hold button to change faster);

5. When the month/day and 12/24 hour format is flashing, press E/C
button to convert;

6. When the LCD contrast is flashing, press E/C button to
increase/decrease the contrast level (1-10);

7. When the beep is flashing, press E/C button to switch ON/OFF it;

8. Press and hold B button to save and exit.

5.0 Pedometer Mode

 Under time mode, press B button to enter into pedometer

mode and the step value will be 0;

 Under pedometer mode, press A button, EL back-light will last

3 seconds;

 Press and hold A button for 3 seconds to zero-clear the step

value;

 Press B button to enter into pedometer storage mode, press

and hold B button to enter into pedometer setting mode;

 Press C button, nothing will happen; press and hold C button

to switch ON/OFF pedometer；

 Press D button, nothing will happen;
 Press E button to convert the modes sequentially as below:

Step→Mileage→Calorie→Sport time→Step

NOTE:

1. The step icon will appear if pedometer starts;

2. Only under pedometer mode, press and hold C button to

switch ON/OFF pedometer.

5.1 Pedometer Setting Mode

 Under pedometer mode, press and hold B button to enter into

setting and reviewing user information, the default setting of

metric system will flash;
 Press B button to convert the modes sequentially as below:
Metric/Imperial System→Step distance→Weight→Metric/Imperial
System

 Metric/Imperial system: the default system is metric, press

E/C button to convert metric/imperial system. After

adjustment, weight and step distance unit will be changed

automatically;
 Weight setting: the default value is 75 kg(165LB), the setting

range is: 20-200KG/44-441LB;
 Step distance setting: the default value is 70CM(28INCH), the

setting range is: 30-180CM/12-77INCH;
 Press E/C button to increase/decrease the digit, press and

hold E/C button to change faster;
 Press B button to save and exit.

6.0 Pedometer Storage Mode

1. Under time mode, press B button two times to enter into
pedometer storage mode, then will display the default data;

2. Under pedometer storage mode, press A button, EL back-light
will last for 3 seconds;

3. Press and hold A button over 3 seconds, then the storage data
will be cleared;

4. Press B button to enter into alarm mode;

5. Press C button, nothing will happen;

6. Press C button to review 7 days history data (if any);

7. Press E button to convert the data of each day sequentially (if
any):

steps-->distance-->calorie-->sport time

7.0 Alarm Mode-Alarm 1, Alarm 2 and Hourly
Chime

Alarm 1, Alarm 2

 The watch contains 2 sets of alarm: alarm 1 and alarm 2,

working independently;
 Press E button to convert among alarm 1, alarm 2 and hourly

chime;

How to Switch ON/OFF Alarms

1. Under alarm 1 (2) mode, press C button to switch ON/OFF alarm

1 (2);

2. When alarm 1 (2) is ON, the icon will appear;

3. If the alarm icon appears, the watch will beep at the presetting
alarm time every day, then press any buttons to stop the sound or it
will stop automatically after 30 seconds;
How to Switch ON/OFF Hourly Chime

1. Under hourly chime mode, press C button to switch ON/OFF;

2. When hourly chime is ON, the icon “CHIME”will appear, and the

watch will beep at the hourly time.

7.1 Alarm Mode-Alarm Setting

How to Set the Alarm 1 and Alarm 2

1. Under alarm 1 (2) mode, press and hold B button until the
flashing icon “SET” appears;

2. Press B button to convert between minute and hour;

3. When the minute or hour is flashed (selected), press E/C button
to increase/decrease the digits (press and hold button to change
faster);

4. Press and hold B button to save and exit.

8.0 Chronograph Mode-Switch ON/OFF
Chronograph

Chronograph Mode

 The watch contains functions of cumulative time and lap time;
 The digits are 0 in the first use or after zero clearing;.

How to Switch ON/OFF the Chronograph

1. Under chronograph mode, press E button to switch ON/OFF the
chronograph;

2. Repeat the above mentioned steps, the watch will start

accumulative time;

How to Reset the Chronograph

 Press and hold C button, the chronograph will be reset after it

has been switched off.
NOTE: The lap time before also will be deleted after zero clearing
the chronograph.

8.1 Chronograph Mode-Record and Review Lap Time

Lap Time

 The watch could start lap time up to 100 laps, even if switch

on accumulative time;

How to Record Lap Time

1. When start the chronograph, press C button one time will record
one lap (it will not influence the accumulative time);

2. The lap and time will be displayed; the watch will return to timing
display after 15 seconds and the lap icon will disappear;

3. Repeat the above mentioned steps to achieve the other lap time.

How to Review Lap Time

1. Under chronograph mode, press and hold B button to enter into
reviewing display;

2. Press E/C button to review the lap time before or after (press and
hold button will change faster);

3. Press and hold B button to exit

How to Delete Lap Time

 Press and hold C button, the digits will be zero cleared when

switch off the chronograph.

9.0 Timer Mode

Timer

 The watch will count down from starting time to 0;
 The starting time could be preset.

9.1 Timer Mode-How to Preset the Starting Time

How to Preset the Starting Time

1. Under timer mode, press and hold B button until the flashing icon
“SET” appears;

2. Press B button to convert hour, minute and second;

3. Press E/C button to increase/decrease the digit (press and hold
button to change faster);

4. Press and hold B button to save and exit.

9.2 Timer Mode-Timer Usage

Timer Usage

1. After presetting the starting time, press E button to start/stop
timer;

2. After stopping timer, press C button, then it will recover to the
presetting value before. The watch will return to time mode
automatically if there are no any button operations after pausing for
5 minutes.

Timer Beeping Sound

After timer stopped, the beeping sound will last for 30 seconds.
Press any button to terminate it.

NOTE: Do not switch on EL back-light during timer.

10.0 Pacer Mode-Pacer Usage

Pacer Introduction

 When start the pacer, the watch will work according to setting

BPM;
 BPM setting ranges from 30 to 180, minimum step value is

5BPM;
 The pacer will return to zero and start again under maximum

step value 99999;

Pacer Usage

 Under pacer mode, press E button to start setting and

recording BPM. Press E button again, the pacer will stop.

Repeat the above mentioned steps, it could record

cumulatively;

 Press and hold C button, the record will be cleared;
 Convert to other modes, the pacer will pause; return to pacer

or chronograph mode, it will start beeping;

10.1 Pacer Mode-Pacer Setting

How to Set BPM (frequency)

1. Under pacer mode, press and hold B button to start setting;

2. Press E/C button to increase/decrease the digits (press and hold

button to change faster);

3. Press and hold B button to save and exit.
Walk in accordance with the beeping sound of watch (suitable BPM
is 80-120).
NOTE: To save the power, the watch will exit the pacer mode if it
lasts over 8 hours.

11.0 Dual Time Mode-Dual Time Setting

Dual time and current time is working independently.

How to Set Dual Time

1. Under dual time mode, press and hold B button until the flashing
icon “SET” appears;

2. Press B button to convert minute and hour;

3. Press E/C button to increase/decrease the digit (press and hold
button to change faster);

4. Press and hold B button to save and exit.

12.0 Altimeter Mode-Temperature and Altitude
Historical Chart

Function Display

 The watch contains 2 functions: temperature and altitude

historical chart;
 Press E button to convert temperature and altitude historical

chart;

Temperature Display

Temperature could be displayed with two units: degree Celsius (℃)

or degree Fahrenheit(℉);

Historical Altitude Display

 The watch could record the current altitude value

automatically at every o’clock and generate the historical

altitude chart;

 If the user wants to review the historical altitude value in the

past 23 hours, press C button, then the corresponding altitude

record and its recording time (flashing) will appear on the

display;

12.1 Altimeter Mode-Units Convert

How to Convert between Units?

 Altitude unit: meter(m) or feet(ft);
 Temperature unit: degree Celsius (℃) or degree Fahrenheit

(℉);
 Press and hold E button to convert the units as above.

12.2 Altimeter Mode-Absolute Altitude and Relative
Altitude

Absolute Altitude and Relative Altitude

 Absolute altitude is the vertical distance from the current

location to the sea level;
 Relative altitude is the vertical distance from the current

location to the presetting zero height.

12.3 Altimeter Mode-Altimeter Adjustment

Why the altimeter needs to be adjusted?

 As the altitude value is calculated from the air pressure, but

the air pressure varies often;.
 To achieve a more accurate value, the altimeter needs to be

calibrated appropriately.

4 kinds of altimeter adjustment method

 Zero altitude: set an altitude as 0, in order to measure the

relative altitude easily, until the icon “ ” appears;

 Absolute altitude: set altitude to a target value;
 Sea level air pressure: input a target sea level air pressure

value;
 Factory default setting: reset the watch to factory default

setting, meaning sea level air pressure is 1013.2mb.

NOTE: the above 4 methods work independently, if you choose one
method, then the previous setting of other 3 methods will not work
NOTE: the watch contains the feature of sea level air pressure
correction automatically. It means that the sea level air pressure will
be corrected automatically beneath one same altitude.

12.4 Altimeter Mode-Zero Altitude Adjustment

Zero Altitude Adjustment

1. Under altimeter mode, press and hold B button to convert the
following 4 kinds of adjustment method: zero altitude, absolute
altitude, sea level air pressure and factory default setting;

2. Under zero altitude, press E button, the icon “NO” will appear;

3. When the icon “NO” appears, press E/C button to select “YES”
(adjust the altitude to zero）or “NO”(cancel the adjustment);

4. Press B button to save and exit. If “YES” is selected, then exit
after icon “DONE” for 2 seconds.

12.5 Altimeter Mode-Absolute Altitude Adjustment

Absolute Altitude Adjustment

1. Under altimeter mode, press and hold B button to convert the

following 4 kinds of adjustment method: zero altitude, absolute
altitude, sea level air pressure and factory default setting;

2. Under absolute altitude, press E button, the altitude value will
appear;

3. When the altitude value appears, press E/C button to increase or
decrease the digits to the target altitude value (Press and hold the
button to change faster);

4. Press and hold B button to save and exit.

12.6 Altimeter Mode-Sea Level Air Pressure
Adjustment

Sea Level Air Pressure Adjustment

1. Under altimeter mode, press and hold B button to convert the

following 4 kinds of adjustment method: zero altitude, absolute
altitude, sea level air pressure and factory default setting;

2. Under sea level air pressure (SEAP), press E button, the SEAP
value will appear;

3. When the SEAP value appears, press E/C button to increase or
decrease the digits to the target SEAP value (Press and hold the
button to change faster);

4. Press and hold B button to save and exit.

12.7 Altimeter Mode-Factory Default Setting
Adjustment

Factory Default Setting Adjustment

1. Under altimeter mode, press and hold B button to convert the
following 4 kinds of adjustment method: zero altitude, absolute
altitude, sea level air pressure and factory default setting;

2. Under factory default setting (F.DEF), press E button, the icon
“NO” will appear;

3. When the icon “NO” appears, press E/C button to select “YES”

(factory default setting）or “NO”(cancel the adjustment);

4. Press B button to save and exit. If “YES” is selected, then exit
after icon “DONE” for 2 seconds.

13.0 Barometer Mode-Temperature and Air
Pressure Historical Chart

Function Display

 The watch contains 3 functions: temperature, sea level air

pressure and air pressure historical chart;

Temperature Display

 Temperature could be displayed by degree Celsius (℃) or

degree Fahrenheit(℉);

Air Pressure Historical Chart

 The watch could record the current SEAP value automatically

at every o’clock and generate the air pressure historical chart;

 If the user wants to review the air pressure historical value in

the past 23 hours, press C button, then the corresponding air

pressure record and its recording time (flashing) will appear

on the display;

13.1 Barometer Mode-Unit Convert

How to convert between units

 Air pressure unit: mb/hPa / inHg;
 Temperature unit: degree Celsius (℃) or degree Fahrenheit

(℉);
 Press and hold E button to convert the 4 units as above.

2 kinds of Barometer Adjustment

 Absolute air pressure: adjust the air pressure value to the

target one.
 Factory default setting: reset the watch to factory default

setting.

13.2 Barometer Mode-Absolute Air Pressure
Adjustment

Absolute Air Pressure Adjustment

1. Under barometer mode, press and hold B button to convert the
following 2 kinds of adjustment method: absolute air pressure and
factory default setting;

2. Under absolute air pressure, press E button, the air pressure
value will appear;

3. When the air pressure appears, press E/C button to increase or

decrease the digits to the target air pressure value (Press and hold
the button to change faster);

4. Press B button to save and exit.

13.3 Barometer Mode-Factory Default Setting
Adjustment

Factory Default Setting Adjustment

1. Under barometer mode, press and hold B button to convert the
following 2 kinds of adjustment method: absolute altitude and
factory default setting;

2. Under factory default setting (F.DEF), press E button, the icon
“NO” will appear;

3. When the icon “NO” appears, press E/C button to select “YES”
(factory default setting）or “NO”(cancel the adjustment);

4. Press B button to save and exit. If “YES” is selected, then exit
after icon “DONE” for 2 seconds.

14.0 Compass Mode-Notices

Notices

 Keep your watch away from magnets or magnetic objects;
 Pay attention to the difference between north magnetic pole

and north pole, see more details afterwards;
 Calibrate the compass regularly.

14.1 Compass Mode-Direction and Azimuth

Direction

 As shown in figure, the direction of object B, C, D relative to

object A is separately East, Southeast, Northwest;
Azimuth
 Azimuth is one angle between the object and the true north

(clockwise);
 As shown in figure, the azimuth of object B, C, D relative to

object A is separately 90°, 135°, 315°.

14.2 Compass Mode-Compass Mode

Compass Mode Display

 TOP: direction;
 Middle: azimuth;
 Bottom: current time;
 Digital compass rotation display (imitate the traditional

compass);

IDLE Mode

 The watch will enter into the IDLE mode automatically, if no

any key operation for 1 minutes. Then press any buttons, the

compass will be activated again;
Distortion Mode

 If distortion is being detected, the flashing icon “OFFCAL” will

appear; If it is being occurred, please re-calibrate the

compass. See more details afterwards.

14.3 Compass Mode-Compass Mode

Back Azimuth

 Back azimuth is opposite to azimuth (180°);
 Under compass mode, press C button to convert azimuth and

back azimuth;

 If back azimuth is selected, the icon “-” will appear.

14.4 Compass Mode-Applications of the Compass

Determine the Current Location

 Choose two landmarks in the distance, like mountains,

lighthouses, or buildings, such as mountain A and B as shown

in figure;
 Measure the back azimuth between mountain A/B and your

current location, which is 135°and 270°;
 Draw two straight lines separately in accordance to the

corresponding back azimuth on the map, starting from

mountain A and B;
 The crossing of two lines will be your current location;

Determine the Accuracy of Heading

 Starting from A and ending at E, as shown in figure;
 Mark the inflection point of every direction respectively , which

is B, C, D
 Find out the azimuth of adjacent points, i.e. the azimuth from

A to B is 315°;
 From A to B, you could head according to this azimuth. So

you will arrive at E finally.

14.5 Compass Mode-Magnetic Declination

What is Magnetic Declination

 As shown in figure, there are differences between magnetic

north pole and true north pole. The angle between them is

called magnetic declination;
 The size and orientation of magnetic declination depends on

your location on the earth;
 Calibrations of magnetic declination see the following chapter;

Magnetic Declination Information

 Most professional maps will mark the magnetic declination

information;
 The magnetic declination information of major cities in the

world is given on Chapter 15.7;
 If the magnetic declination information of your city is not given,

then it could obtain from the internet.

14.6 Compass Mode-Magnetic Declination
Compensation

Examples of Magnetic Declination Compensation

 Pay attention to the way of magnetic declination

compensation, minus in west and plus in east
 Example 1: west magnetic declination is 23°and the

azimuth (magnetic north pole) of object B is 323°,

TB=MB-WMB=323°W-23°
TB=323°-23°
TB=300°
The true azimuth is 300°;
 Example 2: east magnetic declination is 22°and the azimuth

(magnetic north pole) of object B is 278°,
TB=MB+EMB=278°E+22°
TB=278°+22°
TB=300°
The true azimuth is 300°.

14.7 Compass Mode-Magnetic Declination in Major
Cities

14.8 Compass Mode-Compass Calibration

When needs to calibrate the compass

 The watch needs to calibrate the compass in the following

situations:

 first use;

 battery replacement;

 distortion status;

 the magnetic declination differs from the before one

after changing location;

How to calibrate the compass

 The compass calibration contains 2 modes: rotation

calibration and magnetic declination calibration;

 The compass accuracy will be improved if 2 modes are being

operated together.

14.9 Compass Mode-Rotation Calibration

Rotation Calibration

1. Under compass mode, press and hold B button;

2. Press B button to convert rotation calibration and magnetic
declination calibration;

3. Press E button to start rotation calibration (digital compass starts
to rotate), meanwhile, rotate the watch horizontally and gradually in
one direction;

4. After 2 circles rotation, it will back to the compass mode.

14.10 Compass Mode-Magnetic Declination
Calibration

Magnetic Declination Calibration

1. Check the magnetic declination of your location firstly;

2. Under compass mode, press and hold B button;

3. Press B button to convert rotation calibration and magnetic
declination calibration;

4. Under magnetic declination calibration mode, press E/C button to
increase/decrease to the target magnetic declination (press and
hold the button to change faster);

5. Press and hold B button to save and exit.

15.0 Battery-Low Battery Reminding

Low Battery Reminding

 Under low battery, the icon of will appear. Please

replace the battery CR2032 immediately;
 Under extremely cold environment, the low battery icon will

appear, and it will disappear in normal environment;
NOTE: All the records of the watch before will be cleared, please
keep the records and reset.

16.0 Appendix-Major Functions

Current Time Mode

 Hour, minute, second, AM/PM, month, day, weekday,

temperature, barometer chart, altitude chart;

Time Format

 12/24 hour format;

Perpetual Calendar

 2004-2099;

Weather Forecast

 4 kinds of weather;

Pedometer Mode

 Accuracy: 1 step;
 Range: 0～999999 steps;
 Calorie, distance and exercise time;

Alarm

 Alarm 1, alarm 2;
 Hourly chime;

Chronograph

 Accuracy: 1/100 second;
 Range: 99 hours 59 minutes 59.99 seconds;

 Cumulative time and 100 laps time;
 Lap review;

Timer

 Accuracy: 1 second;
 Range: 99 hours 59 minutes 59 seconds;
 Beep sound;

Pacer

 Range: 30 BPM to 180 BPM;

Stepping unit: 5 BPM per step;

Dual Time

 Hour, minute, second, AM, PM;

17.0 Appendix-Major Specifications

Altimeter Mode

 Accuracy: 1m (1ft);
 Range: -706m to 9164m (-2316ft to 30065ft);
 Altitude chart: historical altitude chart in last 24 hours;

Barometer Mode

 Accuracy: 0.1 mb/hpa (0.1inHg);
 Range: 300-1100 mb/hpa (8.85inHg-32.48 inHg);
 Altitude chart: historical altitude chart in last 24 hours;

Compass Mode

 Accuracy: 1°;
 Range: 0°-360°;
 Method: 16 directions, azimuth, digital compass, back

azimuth;

Thermometer Mode

 Accuracy: 0.1℃ (0.1℉);
 Range: -10.0℃-60℃ (14℉ to 140℉);

Pedometer Mode

 Accuracy: 1 step;
 Range: 0-999999 steps;

 Calorie: 0-99999.9 Kcal;
 Distance: 0-9999.99 KM (0-9999.99 Miles);

Battery

 3V lithium battery (CR2032);
 Low battery reminding;

Waterproof

 10 ATM