Dect headset headband headset series jabra pro transmission modes dect wireless sound mode stereo type of headphones headband talking time 8 h standby 36 h features adjustable headband microphone noise reduction volume control battery indicator range 120 m signal range outdoor in m 120 m charging time 3 h material plastic earcup material foam weight 50 g colour black call functions answer call end call type of fitting on ear manufacturer