Sony WI-C400 User Manual

Help Guide

Wireless Stereo Headset

WI-C400

Use this manual if you encounter any problems, or have any questions. This Help Guide is also available as a PDF, which can be downloaded here.

Getting started

What you can do with the BLUETOOTH function

About voice guidance

Supplied accessories

Checking the package contents

Replacing the earbuds

Adjusting the cable length

Parts and controls

Location and function of parts

About the indicator

Power/Charging

Charging the headset

Available operating time

Checking the remaining battery charge

System requirements for battery charge using USB

Turning on the headset

Turning off the headset

Making connections

How to make a wireless connection to BLUETOOTH devices

One-touch connection (NFC) compatible Android devices

One-touch connection (NFC) with a smartphone (Android 4.1 or later)

Disconnecting the smartphone by one touch (NFC)

Switching the device by one touch (NFC)

Android devices not compatible with one-touch connection (NFC)

Pairing and connecting with an Android smartphone

Connecting to a paired Android smartphone

iPhone (iOS devices)

Pairing and connecting with an iPhone

Connecting to a paired iPhone

Computers

Pairing and connecting with a computer (Windows 10)

Pairing and connecting with a computer (Windows 8/Windows 8.1)

Pairing and connecting with a computer (Windows 7)

Connecting to a paired computer (Windows 10)

Connecting to a paired computer (Windows 8/Windows 8.1)

Connecting to a paired computer (Windows 7)

Other BLUETOOTH devices

Pairing and connecting with other BLUETOOTH devices

Connecting to a paired BLUETOOTH device

Disconnecting BLUETOOTH connection (after use)

Listening to music

Listening to music via a BLUETOOTH connection

Listening to music from a device via BLUETOOTH connection

Controlling the audio device (BLUETOOTH connection)

Disconnecting BLUETOOTH connection (after use)

Supported codecs

Making phone calls

Receiving a call

Making a call

Functions for a phone call

Disconnecting BLUETOOTH connection (after use)

Using the voice assist function

Using the voice assist function (Google App)

Using the voice assist function (Siri)

Important information

Precautions

Trademarks

Customer support websites

Troubleshooting

What can I do to solve a problem?

Power/Charging

The headset is not turned on.

Charging cannot be done.

Charging time is too long.

The remaining battery charge of the headset is not displayed on the screen of an iPhone or iPod touch.

Sound

No sound

Low sound level

Low sound quality

Sound skips frequently during playback.

BLUETOOTH

Pairing cannot be done.

Unable to connect the headset to a BLUETOOTH device with one-touch connection (NFC)

Unable to make a BLUETOOTH connection

Distorted sound

The BLUETOOTH wireless communication range is short, or the sound skips.

The headset does not operate properly.

No voice from callers

Low voice from callers

Resetting or initializing the headset

Resetting the headset

Initializing the headset to restore factory settings

Help Guide

Wireless Stereo Headset

WI-C400

What you can do with the BLUETOOTH function

The headset uses BLUETOOTH® wireless technology, allowing you to listen to music or make phone calls wirelessly.

Listening to music

You can receive audio signals from a smartphone or music player to enjoy music wirelessly.

Talking on the phone

You can make and receive a call with your hands free, while leaving your smartphone or mobile phone in your bag or pocket.

Help Guide

Wireless Stereo Headset

WI-C400

About voice guidance

You hear voice guidance in the following situations via the headset.

When powering on: “Power on” When powering off: “Power off” When entering pairing mode: “BLUETOOTH pairing” When establishing a BLUETOOTH connection: “BLUETOOTH connected” When disconnecting a BLUETOOTH connection: “BLUETOOTH disconnected” When checking the remaining battery charge: “Battery level high” / “Battery level medium” / “Battery level low” When automatically turning off due to the low battery condition: “Please recharge headset” When turning on the vibration function for receiving a call : “Vibration on” When turning off the vibration function for receiving a call : “Vibration off”

Help Guide

Wireless Stereo Headset

WI-C400

Checking the package contents

After opening the package, check that all items in the list are included in the package. If items are missing, contact your dealer. Numbers in ( ) indicate the item amount.

Wireless Stereo Headset (1) Micro-USB cable (approx. 50 cm (19 3/4 in.)) (1)

Hybrid silicone rubber earbuds (SS/S/M/L 2 each)

Size M earbuds come attached to the headset.

Reference Guide (1) Operating Instructions (1) Other documents (1 set) (*)

May not be supplied in some countries or regions.

Help Guide

Wireless Stereo Headset

WI-C400

Replacing the earbuds

The headset comes with the M size earbuds. If the headset tends to come off or you feel a lack of low frequency sound, change the earbuds to another size to fit your right and left ears comfortably and snugly.

A: SS size (one line) B: S size (two lines) C: M size (three lines) D: L size (four lines)

Remove the earbuds.

Do not pinch the end of the earbud when removing it.

Attach the earbuds.

Do not attach the earbuds loose or skewed.

Help Guide

Wireless Stereo Headset

WI-C400

Adjusting the cable length

You can adjust the cable length by using the cable adjuster to fix the cable. Slide the cable adjuster to fit the headset to your head.

You can put the right and left units on the headset body when you do not use the headset. Put the stopper into a hole to fix the units.

Help Guide

Wireless Stereo Headset

WI-C400

Location and function of parts

left unit1.

Earbuds2.

right unit3. Stopper4. R mark5. Cable adjuster You can adjust the cable length by using this adjuster to fix the cable.

N-mark7. Tactile dot The left unit has a tactile dot.

L mark9. Built-in antenna A BLUETOOTH antenna is built into the headset.

10.

Indicator (blue/red) Lights up in red during charging. Lights up in red or blue to indicate the power or communication status of the headset.

11.

- (

) / ( ) + buttons12.

Multi-function button

/ button

Controls various call and playback functions.

13.

(power) button14.

Related Topic

About the indicator

Checking the remaining battery charge

Micro-USB port Connect a computer to this port with the supplied micro-USB cable to charge the headset.

15.

Microphone Picks up the sound of your voice when talking on the phone.

16.

Help Guide

Wireless Stereo Headset

WI-C400

About the indicator

You can check various statuses of the headset by the indicators.

: Turns on in blue/ : Turns on in red/-: Turns off

Turning on

- (flashes two times)

Turning off

(lights for about two seconds)

BLUETOOTH status indication

Pairing mode

Not connected

- - - - - - (about one-second intervals)

Connection process completed

(flashes quickly for about five seconds)

Connected

- - - (about five-second interval) - - -

Incoming call

Remaining battery charge indication

High

- - - -

Medium

- -

Low (needs to charge)

For details, refer to “Checking the remaining battery charge.”

Charging

While charging

Other

Initialization completed

For details, refer to “Initializing the headset to restore factory settings.”

Hint

When the remaining battery charge becomes low, the indicator turns from blue to red, except for pairing mode.

Help Guide

Wireless Stereo Headset

WI-C400

Charging the headset

The headset contains a lithium ion rechargeable battery. Charge the headset using the supplied micro-USB cable.

Hint

If charging starts while the headset is turned on, the headset will turn off automatically.

Note

If the headset is not used for a long time, the battery may be quickly depleted, however, after a few recharges, the battery life will improve.

If you store the headset for a long time, charge the battery to its full capacity once every 6 months to avoid over discharge.

If the headset is not used for a long time, it may take longer to charge the battery.

Open the micro-USB port cover.

Connect the supplied micro-USB cable to the headset, and then connect the other end to a booted computer.

The indicator (red) of the headset lights up. Charging is completed in about 4.5 hours (*) and the indicator (red) goes off automatically.

After charging is complete, disconnect the micro-USB cable, then close the micro-USB port cover securely to prevent water or dusts being mixed into the headset.

Time required for charging the empty battery to its full capacity. The time may be different depending on the conditions of use.

If the computer enters into hibernation mode while connected to the headset, charging will not be completed properly. Check the setting of the computer before charging. The indicator (red) will go off automatically if the computer enters into hibernation mode. Charge the headset again in this case.

The headset cannot be operated (turning on, BLUETOOTH paring and connection, music playback, etc.) while charging or if kept connected to the computer after charging is complete.

If the headset detects a problem while charging due to following causes, the indicator (red) may turn off, although charging is not complete. In this case, charge again within the charging temperature range. If the problem persists, consult your nearest Sony dealer.

Ambient temperature exceeds the charging temperature range of 5 °C – 35 °C(41 °F - 95 °F). There is a problem with the battery.

If the headset is not used for a long time, the indicator (red) may not light up when you connect the micro-USB cable to charge the headset. In this case, do not disconnect the micro-USB cable from the headset: wait a few minutes until the indicator (red) lights up.

If the life of the built-in rechargeable battery drops significantly, the battery should be replaced. Consult your nearest Sony dealer for replacement of the rechargeable battery.

Avoid exposure to temperature extremes, direct sunlight, moisture, sand, dust or mechanical shock. Never leave the headset in a car parked in the sun.

Use the supplied micro-USB cable only, and connect directly to a computer. Charging will not be completed properly by an indirect connection, such as via a USB hub.

Help Guide

Wireless Stereo Headset

WI-C400

Available operating time

The available operating times of the headset on a fully-charged battery are as follows:

BLUETOOTH connection Music Playback time (SBC/AAC): Max. 20 hours

About 60 minutes of music playback is possible after 15 minutes charging.

Communication time: Max. 20 hours Standby time: Max. 200 hours

Note

Usage hours may be different depending on the settings and conditions of use.

Related Topic

Supported codecs

Help Guide

Wireless Stereo Headset

WI-C400

Checking the remaining battery charge

You can check the remaining battery charge of the rechargeable battery.

When you turn on the headset or press the

button while the headset is on, the indicator (blue) flashes two times, then the indicator (red) flashes. You also hear voice guidance of the remaining battery charge.

3 times

- - - - : High “Battery level high”

2 times

- - : Medium “Battery level medium”

1 time

: Low (needs to charge) “Battery level low”

When the battery is almost empty

The indicator turns red. When the battery becomes empty, the headset sounds a warning beep, you hear voice guidance “Please recharge headset”, and the head set turns off automatically.

When you are using an iPhone or iPod touch

When the headset is connected to an iPhone or iPod touch (iOS 5.0 or later) that supports HFP (Hands-free Profile), it will show an icon that indicates the remaining battery charge of the headset on the screen.

Compatible devices

iPhone or iPod touch (iOS 5.0 or later) supporting Hands-free Profile (HFP)

iOS 10.2 or later

iOS 7.0 or later

iOS 5.X / 6.X

A: Remaining battery charge of the headset

B: 100% to 70% C: 70% to 50% D: 50% to 20% E: 20% or lower (needs to charge)

Help Guide

Wireless Stereo Headset

WI-C400

System requirements for battery charge using USB

The headset contains a lithium ion rechargeable battery, which should be charged before using the headset for the first time.

Personal Computer with pre-installed with any of the following operating systems and USB port:

When using Windows® Windows® 10 Home / Windows® 10 Pro Windows® 8.1 / Windows® 8.1 Pro Windows® 8 / Windows® 8 Pro Windows® 7 Home Basic / Home Premium / Professional / Ultimate

When using Mac Mac OS X (version 10.9 or later)

Note

Sony does not guarantee proper operation in all system environments.

When using Windows 8.1 update using Windows Update.

Help Guide

Wireless Stereo Headset

WI-C400

Turning on the headset

Related Topic

Turning off the headset

Press and hold the

button for about 2 seconds until the indicator (blue) flashes.

Help Guide

Wireless Stereo Headset

WI-C400

Turning off the headset

Related Topic

Turning on the headset

Press and hold the

button for about 2 seconds until the indicator (blue) turns off.

Help Guide

Wireless Stereo Headset

WI-C400

How to make a wireless connection to BLUETOOTH devices

You can enjoy music and hands-free calling with the headset wirelessly by using your device’s BLUETOOTH function.

Device registration (pairing)

When using the BLUETOOTH function for the first time, you must previously register both devices to allow connection. The operation to register a device is called device registration (paring). If the device to be connected does not support the one-touch connection (NFC), operate the headset and the device to perform device registration (pairing). If the device supports one-touch connection (NFC), you can just touch to perform device registration (pairing) and establish a BLUETOOTH connection.

Connecting the headset to a registered (paired) device

When the device is registered, it is not necessary to register it again. Connect to it with an appropriate method.

Help Guide

Wireless Stereo Headset

WI-C400

One-touch connection (NFC) with a smartphone (Android 4.1 or later)

By touching the headset with a smartphone, the headset turns on automatically and then pairs and makes a BLUETOOTH connection.

Compatible smartphones

NFC-compatible smartphones installed with Android™ 4.1 or later

NFC

NFC (Near Field Communication) is a technology enabling short-range wireless communication between various devices, such as smartphones and IC tags. Thanks to the NFC function, data communication - for example, BLUETOOTH pairing - can be achieved easily by simply touching NFC-compatible devices together (i.e., at the N-Mark symbol or location designated on each device).

Unlock the screen of the smartphone if it is locked.

Select [Setting] — [More].

Set the NFC function to on.

* The above procedure is an example. For details, refer to the operating instructions supplied with your Android smartphone.

Touch the headset with the smartphone.

Touch the smartphone on the N-Mark of the headset. Keep touching the headset with the smartphone until the smartphone reacts. Refer to the operating instructions of the smartphone for the designated location to be touched on the smartphone.

Follow the on-screen instructions to complete the pairing and connection. When the headset is connected with the smartphone, the blue indicator starts flashing slowly. You hear voice guidance “BLUETOOTH connected”.

Hint

If you cannot connect the headset, try the following.

Unlock the screen of the smartphone if it is locked, and move the smartphone slowly over the N-Mark. If the smartphone is in a case, remove the case.

If you touch an NFC-compatible smartphone with the headset, the smartphone terminates BLUETOOTH connection with any current device, and connects to the headset (One-touch connection switching).

Related Topic

How to make a wireless connection to BLUETOOTH devices

Disconnecting the smartphone by one touch (NFC)

Switching the device by one touch (NFC)

Listening to music from a device via BLUETOOTH connection

To disconnect, touch the smartphone again. To connect a paired smartphone, perform step 4. Unlock the screen of the smartphone if it is locked.

Help Guide

Wireless Stereo Headset

WI-C400

Disconnecting the smartphone by one touch (NFC)

You can disconnect the headset from the connected smartphone by touching the headset with it.

Note

After the headset is disconnected from the smartphone, if no operation is performed for about 5 minutes, the headset turns off automatically. To turn off the headset before that, press and hold the

button for about 2 seconds. You hear voice guidance

“Power off”, the indicator (blue) goes off, then the headset turns off.

Unlock the screen of the smartphone if it is locked.

Touch the headset with the smartphone.

Touch the smartphone on the N-Mark of the headset. You hear voice guidance “BLUETOOTH disconnected”.

Help Guide

Wireless Stereo Headset

WI-C400

Switching the device by one touch (NFC)

When the headset is connected with a BLUETOOTH device, if you touch an NFC-compatible smartphone on the headset, the headset is connected with the smartphone that touched on the headset most recently (One-touch connection switching). However, if you are talking on a BLUETOOTH mobile phone connected to the headset, you cannot switch the BLUETOOTH connection by one touch. When the headset is connected with an NFC-compatible smartphone, if you touch the smartphone on another NFCcompatible BLUETOOTH headset or BLUETOOTH speaker, the smartphone disconnects from the headset, and connects to the BLUETOOTH device it touched.

Note

Unlock the screen of the smartphone if it is locked.

Help Guide

Wireless Stereo Headset

WI-C400

Pairing and connecting with an Android smartphone

Pairing is the process required to create a link between BLUETOOTH devices to allow wireless connection. You must pair a device with the headset to be able to make a BLUETOOTH connection for the first time. Before you start pairing operation, make sure that:

The smartphone is placed within 1 m(3 feet) of the headset. The headset is charged sufficiently. The operating instructions of the smartphone is on hand.

Enter pairing mode on this headset.

Turn on the headset, when you pair the headset with a device for the first time after you bought it, or after you initialized the headset (the headset has no pairing information). The headset enters pairing mode automatically. When you pair a 2nd or subsequent device (the headset has pairing information for other devices), press and hold the

button for about 7 seconds.

Make sure that the indicator flashes blue and red alternately after you release the button. You hear voice guidance “BLUETOOTH pairing”.

Unlock the screen of the Android smartphone if it is locked.

Search for this headset on the smartphone.

Select [Setting] - [Bluetooth].

Touch [

] next to [Bluetooth] to turn on the BLUETOOTH function.

Hint

The above procedure is an example. For details, refer to the operating instructions supplied with your Android smartphone.

To delete all pairing information, see “Initializing the headset to restore factory settings.”

Note

If pairing is not established within about 5 minutes, pairing mode will be canceled and the headset will turn off. In this case, start over from step 1.

Once BLUETOOTH devices are paired, there is no need to pair them again, except in the following cases:

Pairing information has been deleted after repair, etc. The headset is already paired with 8 devices and another device is to be paired. The headset can be paired with up to 8 devices. If a new device is paired after 8 devices are already paired, the paired device with the oldest connection time is replaced by the new one. When the pairing information for the headset has been deleted from the BLUETOOTH device. When the headset is initialized, all pairing information is deleted. In this case, delete the pairing information of the headset from the BLUETOOTH device, and then pair them again.

The headset can be paired with multiple devices, but can only play music from one paired device at a time.

Related Topic

How to make a wireless connection to BLUETOOTH devices

Connecting to a paired Android smartphone

Listening to music from a device via BLUETOOTH connection

Initializing the headset to restore factory settings

Touch [WI-C400].

If passkey (*) input is required on the display of the smartphone, input “0000.” The headset and the smartphone are paired with each other and connected. You hear voice guidance “BLUETOOTH connected”. If they are not connected, see “Connecting to a paired Android smartphone.” If [WI-C400] does not appear on the display, try again from step 3.

A Passkey may be called a “Passcode,” a “PIN code,” or a “Password.”

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