Sennheiser HD-350BT user manual

There could be various reasons why your Sennheiser HD 350BT headphones keep saying "lost connection." Here are a few possibilities:
1. Bluetooth interference: Interference from other nearby devices, such as smartphones, Wi-Fi routers, or other Bluetooth devices, can cause the connection to drop. Try moving away from such devices or turning them off to see if it improves the connection stability.
2. Low battery: If the battery level of either your headphones or the device it's connected to is low, it can lead to frequent disconnections. Ensure that both your headphones and the device have sufficient battery life.
3. Out of range: Bluetooth connections have a limited range, typically up to 30 feet. If you move too far away from the connected device, the signal may weaken and cause the headphones to lose connection. Try staying within the recommended range to maintain a stable connection.
4. Firmware/software issues: Outdated firmware or software on either the headphones or the connected device can sometimes cause connection problems. Make sure to keep these updated to the latest versions.
5. Pairing issues: If the headphones are not paired correctly with the device, it may result in frequent disconnections. Ensure that you have correctly paired the headphones following the manufacturer's instructions.
6. Hardware defects: In some cases, a faulty device or component within the headphones can cause repeated disconnections. If none of the above solutions work, consider contacting Sennheiser customer support for further assistance or getting the headphones checked by a professional.
It's worth noting that specific troubleshooting steps may vary based on your device and operating system.

To check the battery level on your Sennheiser HD 350BT headphones, follow these steps:
1. Ensure that the headphones are turned on and connected to a device via Bluetooth.
. On your connected device, go to the settings menu and select the Bluetooth settings.
3. Look for the name of your HD 350BT headphones in the list of paired devices and tap on it.
4. You should see a screen displaying various information about the headphones, including the battery level. The battery level is usually represented as a percentage.
5. If the battery level is not displayed in the settings of your device, you can also check the battery level using the Sennheiser Smart Control app. Download and install the app on your mobile device, connect your HD 350BT headphones to the app, and the battery level will be displayed in the app's interface.
Please note that the exact process may vary slightly depending on the device you are using to connect to your headphones.

To put your Sennheiser HD 350BT headphones in pairing mode, follow these steps:
1. Ensure that your headphones are turned off.
. Press and hold the Power button located on the right earcup until you see the LED light flashing blue and red. This indicates that the headphones are in pairing mode.
3. On your device (e.g., smartphone, tablet, or computer), enable Bluetooth and go to the Bluetooth settings menu.
4. Scan for available devices. Your Sennheiser HD 350BT should appear on the list of discoverable devices as "HD 350BT."
5. Select the headphones from the list to pair them with your device. Once connected, the LED light on the headphones will turn solid blue, indicating a successful pairing.
Note: If your device requires a PIN code for pairing, enter "0000" (four zeroes).
Once paired, your Sennheiser HD 350BT headphones are ready for use with your device. Remember to follow the device's Bluetooth instructions for connecting to the headphones in the future.