Sennheiser MM 400 Instructions for Use - Page 17

Using the MM 400 ¿ Using the MM 400 Adjusting the MM 400 to the listening situation The headset has a Bluetooth function for wireless connectivity. Depending on the listening situation, you can switch this function on or off. Switching the Bluetooth function on/off Via the Bluetooth interface, the headset can be connected to a wide variety of Bluetooth enabled devices. To switch the Bluetooth function on: ̈ Press the Bluetooth button ¿ and keep it pressed until the LED ቢ flashes 3 times blue. The Bluetooth function is switched on. To switch the Bluetooth function off: ̈ Press the Bluetooth button ¿ and keep it pressed until the LED ቢ flashes 3 times red. You hear a descending beep. The Bluetooth button ¿ goes off. The LED ቢ flashes blue and the Bluetooth function is switched off. Changing the volume The MM 400 allows you to change the volume of the audio signal: Button Duration Function Button Incrementally increases the volume Continuously 1 s increases the volume Duration Function Incrementally reduces the volume Continuously 1 s reduces the volume If you press the respective button briefly, the volume is changed incrementally; if you hold down the button, the volume is changed continuously. When the minimum or maximum volume is reached, you hear an acknowledgement tone. 16