SENNHEISER HD 350BT Around-Ear Wireless Headphones User Manual

SENNHEISER HD 350BT Around-Ear Wireless Headphones

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 defective or makes a loud, unusual (whistling or beeping) noise.
• Only use the product in environments where Bluetooth® wireless transmission is permitted.

Preventing damage to health and accidents

• Protect your hearing from high volume levels. Permanent hearing damage may occur when headphones are used at high volume levels for long periods. Sennheiser headphones sound exceptionally good at low and medium volume levels.
• The product generates stronger permanent magnetic fields that could cause interference with cardiac pacemakers, implanted defibrillators (ICDs), and other implants. Always maintain a distance of at least 3.94″/10 cm between the product component containing the magnet and the cardiac pacemaker, implanted defibrillator, or other implant.
• Keep the product, accessories, and packaging parts out of reach of children and pets to prevent accidents. Swallowing and choking hazard.
• Do not use the product in an environment that requires your special attention (e.g. in traffic or when performing skilled jobs).

Preventing damage to the product and malfunctions

• Always keep the product dry and do not expose it to extreme temperatures (hairdryer, heater, extended exposure to sunlight, etc.) to avoid corrosion or deformation. The normal operating temperature is from 0 to 40 °C/32 to 104 °F.
• Use only attachments/accessories/spare parts supplied or recommended by Sennheiser.
• Clean the product only with a soft, dry cloth.
• Use the product with care and store it in a clean, dust-free environment.

Notes on data collection and processing, and firmware updates

This product stores individual settings such as the volume and the Bluetooth addresses of paired devices. This data is required for the operation of the product and is not transferred to Sennheiser or companies commissioned by Sennheiser, and is not processed. Using the “Sennheiser Smart Control” app, you can update the firmware of the product for free via an Internet connection. If the device on which the app is installed is connected to the Internet, the following data is automatically transferred to and processed by Sennheiser servers in order to provide and transfer suitable firmware updates: hardware identifier, hardware revision number, firmware version of the product, operating system type (Android, iOS) and version, version of the app. The data will only be used as specified and will not be stored permanently. If you do not want this data to be transferred and processed, do not connect to the Internet.

Package contents

Online, you can find:

• This detailed instruction manual and additional information www.sennheiser.com/downioad
• The Sennheiser Smart Control app for configuring the headphones and for additional functions www.sennheiser.com/smartcontrol

[i] A list of accessories can be found on the HD 350BT product page at www.sennheiser.com. Contact your local Sennheiser partner: www.sennheiser.com/service-support.

Product overview

1. Headband
2. Ear cup joints
3. Ear cups, steplessly adjustable
4. On/off button for 4 seconds activates the Bluetooth pairing mode
5. LED
6. USB-C socket for charging
7. Volume – button (volume down)
8. Volume + button (volume up)
9. 3-way multi-function button for music and call functions
10. Voice assistant button
11. Ear pads
12. Speech microphones (2 pcs.) for phone calls

Overview of the LED display

During operation

LED		Meaning: the headphones
	flashes blue 3x	switch on
	flashes blue 3x	are connected to a device via Bluetooth
	flashes red/ blue	are in Bluetooth pairing mode
	flashes red 3x	are not connected to a device via Bluetooth or the connection has been lost

During phone calls

LED		Meaning
	flashes blue	Incoming call
	flashes red	The incoming call and the rechargeable battery of the headphones is almost empty

• If the LED does not light up immediately during charging, clean the charging socket and charge the headphones until the LED lights up again (> 11).

Notes on voice prompts

The headphones output voice prompts for various functions (see examples below).

Notes on beeps/acoustic signals

The headphones output beeps/acoustic signals for the following functions.

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 (> 11).
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. adjust the sound to your liking using the equalizer (> 15).
3. Connecting the headphones to a Bluetooth device
   Connect the headphones to your smartphone via Bluetooth (> 12).
4. Putting the headphones on and adjusting the headband
   For good sound quality and best possible wearing comfort, the headband can be adjusted to properly fit your head (> 17).

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 up to 2 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 (> 7). Once the headphones are fully charged, the LED flashes blue for 5 minutes and then goes off. When the battery charge drops to a critical level, a voice prompt asks you to recharge the headphones (“Recharge headset”). Sennheiser recommends using the supplied USB cable and a compatible standard USB power supply for charging the headphones. While the headphones are being charged, you can still listen to music or make phone calls. In this case, however, the charging time may be longer.

Charging the headphones’ rechargeable battery

1. Connect the USB-C connector of the charging cable to the USB socket of the headphones.
3. Connect the USB-A connector to a corresponding socket of a USB power source (to be ordered separately). Make sure that the USB power source is connected to the power supply system. The charging process of the headphones begins. The LED displays the charge status:
   

   LED		Meaning
   	lights up red	The rechargeable battery is being charged
   	Flashes blue for 5 minutes, then the LED goes off	The rechargeable battery is fully charged

• If the LED does not light up immediately during charging, clean the charging socket and charge the headphones until the LED lights up again (> 11).
• You can speed up the charging process by charging the headphones when they are switched off.

Connecting the headphones to a Bluetooth device

To be able to use the Bluetooth connection, you must register both devices (headphones and e.g., smartphone) once. This process is called pairing. If the operation differs from the steps mentioned, also refer to the instruction manual of the Bluetooth device you are using.

• When you switch on the headphones for the first time, they automatically switch to pairing mode.

Information on the Bluetooth wireless connection

The headphones are compatible with Bluetooth 5.0. If your audio source supports one of the following high-resolution audio encoding methods, music is automatically played in high audio quality: aptX, aptX LL, or AAC. Otherwise, the headphones will play your music in normal audio quality (SBC). Paired devices establish the Bluetooth wireless connection immediately after switch-on and are ready for use. On switch-on, the headphones automatically try to connect to the last two connected Bluetooth devices. The headphones can save the connection profiles of up to eight Bluetooth devices with which they have been paired. Audio playback is only possible from one device at a time. If you pair the headphones with the ninth Bluetooth device, the saved connection profile of the least-used Bluetooth device will be overwritten. If you want to re-establish a connection with the overwritten Bluetooth device, you have to pair the headphones again.

Paired and connected Bluetooth device
Paired Bluetooth device (currently not connected)

Pairing the headphones with a Bluetooth device

1. Switch the headphones off and place them close to the Bluetooth device (max. 20 cm).
2. Press and hold the on/off button for 4 seconds. The LED flashes red and blue. 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. All active Bluetooth devices in the proximity of your Bluetooth device are displayed.
5. From the list of found Bluetooth devices, select “HD 350BT”. If necessary, enter the default pin code “0000”.
6. If pairing was successful, you hear the voice prompt “Connected”. The LED flashes blue 3x.

• If no connection is established within 5 minutes, pairing mode is terminated and the headphones switch to standby mode. If necessary, repeat the steps described above.
• If you switch on the headphones for the first time (the pairing list is empty), they automatically switch to pairing mode.

Disconnecting the headphones from a Bluetooth device

• Via the menu of your Bluetooth device, disconnect the connection to the headphones. The headphones are disconnected from the Bluetooth device. You hear the voice prompt “Lost connection”. The headphones switch to standby mode.
  • To delete the Bluetooth pairing list of the headphones, > 27.

Installing the Smart Control app

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.com/smartcontrol

• Connect your smartphone to the headphones via Bluetooth (> 12).
• Start the Smart Control app.
• Follow the instructions in the app.

The Smart Control app recognizes the headphones and activates all available settings and functions.

Switching the headphones on

1. Unfold both ear cups.
   The joints click into place.
2. Press and hold the on/off button for 2 seconds.
   The LED flashes blue 3x. You hear the voice prompt “Power on”. If Bluetooth is activated on the headphones and a paired device is available, the LED flashes blue 3x and you hear the voice prompt “Connected”.

• Make sure that Bluetooth is already activated on your Bluetooth device when switching on 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 3x. The headphones switch to standby mode.

Switching the headphones off

1. Press and hold the on/off button for 2 seconds.
2. You hear the voice prompt “Power off” and the LED flashes red 3x. The headphones switch off.

Putting the headphones on and adjusting the headband

For good sound quality and the best possible wearing comfort, the headband can be adjusted to properly fit your head.

• Wear the headphones so that the headband runs over the top of your head. The markings R for the right side and L for the left side can be found on the inside of the headband.
• Move the ear cups up or down the headband slider until:
  • Your ears are comfortably covered by the ear pads,
  • You feel even, gentle pressure around your ears,
  • A snug fit of the headband on the head is ensured.

For optimal sound quality, the ear pads must surround your ears.

Retrieving information on the battery charge status

When the headphones are connected to your Bluetooth device, the battery charge status can be displayed on the screen of your smartphone (depending on the device and operating system used). The Smart Control app also displays the battery charge status. You can retrieve information on the battery charge status on the headphones by pressing the center of the volume button 1x.

Specifications

Model: SEBT3

Bluetooth

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. In compliance with the following requirements

• General Product Safety Directive (2001/95/EC)
• Compliant to Sound Pressure Limits according to country-specific requirements

EU declaration of conformity

• RoHS Directive (2011/65/EU)
  Hereby, Sennheiser Electronic GmbH & Co. KG declares that the radio equipment type SEBT3 is in compliance with the Radio Equipment Directive (2014/53/EU). The full text of the EU declaration of conformity is available at the following Internet address: www.sennheiser.com/download.

Notes on disposal

• WEEE Directive (2012/19/EU)
• Battery Directive (2006/66/EC & 2013/56/EU)

The symbol of the crossed-out wheeled bin on the product, the battery/rechargeable battery (if applicable), and/or the packaging indicates that these products must not be disposed of with normal household waste, but must be disposed of separately at the end of their operational lifetime. For packaging disposal, please observe the legal regulations on waste segregation applicable in your country. Further information on the recycling of these products can be obtained from your municipal administration, from the municipal collection points, or from your Sennheiser partner. The separate collection of waste electrical and electronic equipment, batteries/rechargeable batteries (if applicable,) and packaging is used to promote the reuse and recycling and to prevent negative effects caused by e.g. potentially hazardous substances contained in these products. Here with you make an important contribution to the protection of the environment and public health.

Trademarks

Sennheiser is a trademark of Sennheiser Electronic GmbH & Co. KG, registered in the U.S. and other countries. Apple, the Apple logo, and Siri are trademarks of Apple Inc., registered in the U.S. and other countries. App Store is a service mark of Apple Inc. Android and Google Play are registered trademarks of Google Inc. The Bluetooth® word mark and logos are registered trademarks owned by Bluetooth SIG, Inc,. and any use of such marks by Sennheiser Electronic GmbH & Co. KG is under license. Qualcomm aptX is a product of Qualcomm Technologies International, Ltd. Qualcomm is a trademark of Qualcomm Incorporated, registered in the United States and other countries, used with permission. aptX is a trademark of Qualcomm Technologies International, Ltd., registered in the United States and other countries, used with permission. Other product and company names mentioned in the user documentation may be the trademarks or registered trademarks of their respective holders.

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SENNHEISER HD 350 BT Around-Ear Wireless Headphones- FAQs