Sennheiser MM 400 Instructions for Use - Page 11

Putting the MM 400 into operation b Connecting the charging cable to the mains unit, to a PC or to other USB devices In order to charge the battery pack, you can connect the charging cable to either the USB socket of your PC or the supplied mains unit or to other USB devices. To connect the charging cable to a PC: ̈ Connect the USB plug of the charging cable µ to the USB socket of your PC. The battery pack is being charged. The LED ¾ on the battery pack ¾ lights up red. To connect the charging cable to the mains unit: ̈ Connect the charging cable µ to the mains unit. EU ̈ Plug the suitable country adapter onto the mains unit. UK ̈ Plug the mains unit into a wall socket. The battery pack is being charged. The LED ¾ on the battery pack US lights up red. AU ̈ After charging, unplug the mains unit from the wall socket. If you have charged the battery pack outside the headset: ̈ Insert the charged battery pack into the headset's battery pack µ compartment until it locks into place. ̈ Close the battery pack compartment cover ¶. Adjusting the headband For optimum transmission quality, good noise attenuation and best possible comfort, the headband has to be adjusted to properly fit your head: ̈ Wear the headset so that the headband ³ runs over the top of your head. ̈ Adjust the length of the headband so that - the ear pads ´ rest comfortably against the ears, - you feel even, gentle pressure around your ears, - a snug fit of the headband ³ on the head is ensured. ̈ To ensure maximum noise attenuation, final adjustment is best made in a noisy environment. 10