CX 350BT In-Ear Wireless Model: SEBT1 Instruction manual Use the search function, the navigation (left) or the following links: Start “Product overview” “Getting started” “Using the headphones” “FAQ/If a problem occurs ...” “Specifications” Sennheiser electronic GmbH & Co. KG Am Labor 1 30900 Wedemark Germany www.sennheiser.
Important safety instructions Important safety instructions ▷ Read this instruction manual carefully and completely before using the product. ▷ Always include this instruction manual when passing the product on to third parties. ▷ Do not use the product if it is obviously defective or makes loud, unusual (whistling or beeping) noise. ▷ Only use the product in environments where Bluetooth wireless transmission is permitted.
Important safety instructions 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. Do not heat above 60 °C/140 °F, e.g. do not expose to sunlight or throw into fire. When not using the product for extended periods of time, charge its built-in rechargeable battery regularly (about every 3 months). Switch rechargeable battery-powered products off after use.
Package contents Package contents Headphones USB charging cable with USB-C and USB-A connector Silicone ear adapter set in the following sizes: XS, S, M (pre-mounted upon delivery) and L Quick guide Safety guide Online you can find: • this detailed instruction manual and additional information (www.sennheiser.com/download) • the Sennheiser Smart Control app for getting to know the headphones (www.sennheiser.com/smartcontrol) You can find a list of accessories on the CX 350BT product page at www.
Product overview Product overview CX 350BT Model: SEBT1 5 1 Right R *M OFF ON 5 6 PAIRING MUSIC 4 3 2 Left L 9 TELEPHONE 7 7 8 Earphones Voice assistant button LED Volume + button (volume up) Multi-function button Volume - button (volume down) USB-C socket for charging the rechargeable battery Cover for USB-C socket Microphone CX 350BT | 5
Product overview Overview of the LED indications of the headphones LED Meaning; the headphones lights up red are being charged lights up blue are fully charged flashes blue are switched on flashes red-blue are in Bluetooth pairing mode approx. 1 min flashes blue Bluetooth pairing successful flashes red Bluetooth pairing failed flashes blue are connected to a device via Bluetooth pulses red approx.
Product overview Voice prompt Meaning/headphones “Mute on” Microphone is muted, active call is put on hold “Mute off” Microphone is reactivated “Recharge headset” Rechargeable battery is empty. Recharge the headphones.
Getting started Getting started 1. Charging the rechargeable battery The headphones' rechargeable battery is not fully charged upon delivery. Before using the headphones for the first time, charge the rechargeable battery for a complete charging cycle without interruption (> 9). USB-C USB-A 2. Installing the Smart Control app on your smartphone The Sennheiser Smart Control app allows you to use all functions and settings of the headphones and to e.g.
Using the headphones Using the headphones Information on the rechargeable battery and the charging process The headphones have a built-in rechargeable battery. A complete charging cycle takes approx. 2.5 hours. Before using the headphones for the first time, charge the rechargeable battery for a complete charging cycle without interruption. When the headphones are being charged, the LED lights up (> 6).
Using the headphones Connecting the headphones to a Bluetooth device To be able to use the Bluetooth wireless connection, you must register both devices (headphones and e.g. smartphone) via the device settings of your smartphone. This process is called pairing. If operation differs from the steps mentioned, also refer to the instruction manual of the Bluetooth device you are using. If you switch on the headphones for the first time, they automatically switch to pairing mode.
Using the headphones Pairing the headphones with a Bluetooth device 1. Switch the headphones on (> 13) and place them close to the Bluetooth device (max. 20 cm). 2. Press and hold the multi-function button for 5 seconds until you hear the voice prompt “Pairing”. The LED flashes blue and red. The headphones are in pairing mode. 3. Activate Bluetooth on your Bluetooth device. 4. Via the menu of your Bluetooth device, start the search for new Bluetooth devices.
Using the headphones Installing the Smart Control app “Sennheiser Smart Control” To make full use of all the settings and functions of the headphones, you need to have the free Sennheiser Smart Control app installed on your smartphone. Download the app from the App Store or Google Play and install it on your smartphone. Alternatively, you can use your smartphone to scan the following QR code or to call up the following Internet site: www.sennheiser.
Using the headphones Inserting the earphones into the ears R ▷ Put the cable around your neck. ▷ Assign the right earphone to your right ear and the left earphone to your left ear. ▷ Press the earphones lightly into the ear canal. If the earphones fit too loose in the ear canal and fall out easily: ▷ Try larger ear adapters. If you feel immediate pressure when wearing the earphones: ▷ Try smaller ear adapters.
Using the headphones If Bluetooth is activated and the headphones cannot find a paired Bluetooth device within a few minutes, you hear the voice prompt “Lost connection”. The LED flashes red. The headphones switch to standby mode. Switching the headphones off OFF 3x Hold “Power off“ 3s ▷ Press the multi-function button for 3 seconds. You hear the voice prompt “Power off” and the LED flashes red 3x.
Using the headphones Adjusting the volume WARNING Danger of hearing damage due to high volume levels! Listening at high volume levels can lead to permanent hearing defects. ▷ Before putting the headphones on and before toggling between audio sources, adjust the volume to a low level. ▷ Do not continuously expose yourself to high volume levels. You can adjust the volume for music, voice prompts, and phone calls.
Using the headphones Controlling music playback The music playback functions are only available when the headphones and the device are connected via Bluetooth. Some smartphones or music players may not support all functions. Playing/pausing music ▷ Press the multi-function button 1x. Multi-function button Press 1x Function Plays or pauses music Playing the next track ▷ Quickly press the multi-function 2x.
Using the headphones Accepting/rejecting/ending a call If your headphones are connected to a smartphone and you receive a call, you hear a ring tone in the headphones. If you are playing music when you receive a call, the music pauses until you end the call.
Using the headphones Automatically accepting a call You can automatically accept an incoming call when the headphones are switched on and connected. To be able to activate this function, you require the Smart Control app (> 12). Adjusting sound effects/the equalizer To be able to use the sound effects/equalizer, you require the Smart Control app (> 12). ▷ In the Smart Control app, select the desired sound effects via the equalizer. The sound effects are stored in your headphones.
Care and maintenance Care and maintenance CAUTION Liquids can damage the electronics of the product! Liquids entering the housing of the product can cause a short-circuit and damage the electronics. ▷ Keep all liquids far away from the product. ▷ Do not use any solvents or cleansing agents. ▷ Clean the product only with a soft, dry cloth. Replacing the ear adapters For reasons of hygiene, you should replace your ear adapters from time to time.
Care and maintenance Installing firmware updates Firmware updates can be downloaded free of charge from the Internet using the Sennheiser Smart Control app. ▷ Connect the headphones to your smartphone and start the Smart Control app (> 12). The app provides information on available firmware updates and guides you through the installation process.
FAQ/If a problem occurs ... FAQ/If a problem occurs ... Current list of frequently asked questions (FAQ) Visit the CX 350BT product page at www.sennheiser.com/download There you will find a current list of frequently asked questions (FAQ) and suggested solutions. Your question has not been answered or the problem persists? If a problem occurs that is not listed in the FAQ section or if the problem cannot be solved with the proposed solutions, please contact your Sennheiser partner for assistance.
Specifications Specifications CX 350BT Model: SEBT1 Wearing style Bluetooth® neckband cable Ear coupling ear-canal Frequency response 20 Hz to 20,000 Hz Transducer principle dynamic Transducer size 9.7 mm Sound pressure level (SPL) 107±3 dB (1 kHz/0 dBFS) measured according to IEC711 THD (1 kHz, 100 dB) < 0.5 % (1 kHz, 100 dB SPL) Microphone principle MEMS Microphone frequency response 100 Hz to 8,000 Hz Microphone sensitivity (as -42 dB V/Pa per ITU-T P.
Manufacturer Declarations Manufacturer Declarations Warranty Sennheiser electronic GmbH & Co. KG gives a warranty of 24 months on this product. For the current warranty conditions, please visit our website at www.sennheiser.com or contact your Sennheiser partner.
Manufacturer Declarations Other product and company names mentioned in the user documentation may be the trademarks or registered trademarks of their respective holders.
