Sennheiser HD 450BT Instruction manual HD 450BT - Page 16

Using the headphones Switching the headphones on 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, adjust the volume to a low level (> 19). ▷ Do not continuously expose yourself to high volume levels. 1. Unfold both ear cups. The joints click into place. 2. Press and hold the on/off button for 4 seconds. The LED flashes red/blue. If Bluetooth is activated on the headphones, you hear the voice prompts "Power on" and "Device (1) connected". If Bluetooth is deactivated on the headphones, you hear the voice prompt "Power on". If necessary, connect the audio cable to the headphones. 1 2 ON "Power on" Hold 4s "Device (1) 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. 16 | HD 450BT