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M2 IEBT SW
In-Ear Wireless
Instruction Manual
2 | M2 IEBT SW
Contents
Contents |
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Important safety instructions...................................................................... |
2 |
The M2 IEBT SW In-Ear Wireless headphones............................................. |
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Package includes.......................................................................................... |
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Product overview........................................................................................... |
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Overview of the headphones....................................................................... |
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Overview of pictograms............................................................................... |
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Overview of the LED indications............................................................... |
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Overview of buttons..................................................................................... |
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Getting started............................................................................................. |
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Charging basics........................................................................................... |
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Pairing the headphones.............................................................................. |
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Using the headphones................................................................................. |
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Wearing the headphones............................................................................ |
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Switching the headphones on.................................................................... |
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Switching the headphones off.................................................................... |
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Adjusting the volume.................................................................................. |
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Checking the battery life of the headphones.......................................... |
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Playing music/videos................................................................................. |
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Controlling music playback....................................................................... |
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Making calls on the headphones .............................................................. |
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Voice control function................................................................................ |
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Care and maintenance................................................................................ |
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Changing ear adapters............................................................................... |
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Storage and handling.................................................................................. |
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Replacing/removing the rechargeable battery....................................... |
27 |
Troubleshooting.......................................................................................... |
28 |
Clearing previously paired devices........................................................... |
29 |
Specifications.............................................................................................. |
30 |
Trademarks................................................................................................... |
31 |
M2 IEBT SW | 1
Important safety instructions
Important safety instructions
XX Read this instruction manual carefully and completely before using the product.
XX Do not use an obviously defective product.
XX Only use the product in environments where Bluetooth® wireless transmission is permitted.
Preventing damage to health and accidents
XX Protect your hearing from high volume levels. Permanent 
hearing damage may occur when headphones are used at high volume levels for long periods of time. Sennheiser headphones sound exceptionally good at low and medium volume levels.
XX Do not insert the ear canal phones too deep into your ears and never insert them without ear adapters. Always extract the ear canal phones from your ears very slowly and carefully.
XX Keep the headphones at least 10 cm/3.94” from cardiac pacemakers or implanted defibrillators. The headphones contain magnets that generate a magnetic field which could cause interference with cardiac pacemakers and implanted defibrillators.
XX Keep the product, accessories and packaging parts out of reach of children and pets to prevent accidents and choking hazards.
XX Do not use the product in situations which require special attention (e.g. in traffic or when performing skilled jobs).
Preventing damage to the product and malfunctions
XX Always keep the product dry and do not expose it to extreme temperatures to avoid corrosion or deformation. The normal operating temperature is from 10 to 40°C/50 to 104°F.
XX Only use attachments/accessories/spare parts supplied or recommended by Sennheiser.
XX Clean the product only with a soft, dry cloth.
XX Use the product with care and store it in a clean, dust-free environment.
2 | M2 IEBT SW
Important safety instructions
Intended use/Liability
These in-ear wireless headphones are designed for use with mobile devices (e.g. mobile music players, mobile phones, tablets) that support wireless communication via Bluetooth. Compatible Bluetooth devices include those that support the following profiles: Hands Free Profile (HFP), Advanced Audio Distribution Profile (A2DP), and Audio/Video Remote Control Profile (AVRCP).
It is considered improper use when this product is used for any application not named in the associated instruction manuals and product guides.
Sennheiser does not accept liability for damage arising from abuse or misuse of this product and its attachments/accessories.
Before putting the product into operation please observe the respective country-specific regulations!
Safety instructions for the Lithium-Polymer battery pack
WARNING
In extreme cases, abuse or misuse of the Lithium-Polymer battery pack can lead to:
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explosion |
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heat generation |
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fire development |
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smoke or gas development |
Dispose of products with built-in rechargeable batteries at special collection points or return them to your specialist dealer.
Only use rechargeable batteries and chargers recommended by Sennheiser.
Charge products with built-in rechargeable batteries at ambient temperatures between 10 and 40°C/50 and 104°F.
Switch battery-powered products off after use.
When not using the product for extended periods of time, charge its built-in rechargeable batteries regularly (about every 3 months).
Do not heat above 70°C/158°F, e.g. do not expose to sunlight or throw into fire.
Do not charge a product with built-in rechargeable batteries if the product is obviously defective.
M2 IEBT SW | 3
The M2 IEBT SW In-Ear Wireless headphones
The M2 IEBT SW In-Ear Wireless headphones
The M2 IEBT SW In-Ear Wireless headphones delivers uncompromised style, sound performance and take-anywhere mobility. The high-quality design of the headphones isn’t complete without the exceptional wireless sound assured by Bluetooth 4.2 and Qualcomm® aptX™ or AAC audio codec.
Features
•Custom-machined, stainless-steel, in-ear sound tunnels for superior acoustic precision
•Supports Qualcomm® aptX™ for true Hi-Fi sound
•Supports AAC (Advanced Audio Coding) for greater sound quality and transparency
•6 hour battery life with 1.5 hour charging
4 | M2 IEBT SW
The M2 IEBT SW In-Ear Wireless headphones
Bluetooth
The M2 IEBT SW In-Ear Wireless headphones comply with theBluetooth 4.2 standard and are compatible with all Bluetooth 1.1, 1.2, 2.0, 2.1, 3.0, 4.0 and 4.1 devices with the following profiles: Hands Free Profile (HFP), Advanced Audio Distribution Profile (A2DP), and Audio/Video Remote Control Profile (AVRCP).
aptXTM
With AAC or aptXTM audio coding, you can be assured of crisp, pure and full stereo sound. It allows you to not only hear, but experience and feel the audio as it was intended. Utilizing aptXTM, Bluetooth technology can now offer wireless audio quality that is indistinguishable from the highest quality wired connection.
aptXTM LL
Qualcomm® aptX™ LL (Low Latency) audio ensures your Bluetooth® wireless enabled device can deliver sound in sync with visual media. It reduces delay and improves end-to-end speed of the audio transmission, resulting in a high quality, synchronized user experience. With aptX Low Latency you can enjoy the freedom of wireless for applications such as gaming and watching videos.
M2 IEBT SW | 5
Package includes
Package includes
Headphones
XS S L
Quick
Guide
Safety
Guide
Carry case
Ear adapters
USB cable for charging
Quick guide
Safety guide
A list of accessories can be found at www.sennheiser.com. For information on suppliers, contact your local Sennheiser partner: www.sennheiser.com > “Sales Partner“.
6 | M2 IEBT SW
Product overview
Product overview
Overview of the headphones
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1 Ear adapters |
6 Volume/track - button |
2 Bluetooth antenna (not visible) |
7 LED |
3 Cable organizer |
8 Micro-USB input |
4 Volume/track + button |
9 Micro-USB cover |
5 Multifunction button |
0 Magnetic clasp |
M2 IEBT SW | 7
Product overview
Overview of pictograms
Pictograms for pressing a button
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1x |
Press and immediately release the button |
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2x |
Press the button twice |
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2s |
Press the button and hold for 2 seconds |
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8 | M2 IEBT SW
Product overview
Pictograms for the LED
Pictogram |
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The LED lights up |
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The intervals signify flashing |
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The LED lights up/flashes continuously |
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3s |
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The time the LED lights up before blinking |
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Examples of pictograms that may be used in this manual: |
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Pictogram |
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Meaning |
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The LED flashes continuously |
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3s |
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The LED lights up for 3 seconds, then off, and repeat |
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2s |
2s |
The LED lights up, then off for 2 seconds, and repeat |
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The LED lights up continuously
The LED continuously flashes blue and red per 1s 
second
The pictogram “i”
Notes marked with the pictogram “i” provide useful information on the use of the headphones.
M2 IEBT SW | 9
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