Dect headset headband headset type of fitting on ear call function reject call answer end button muting function dsp technology rechargeable series jabra pro transmission modes bluetooth dect wireless sound mode mono types of headphones headband earhook neckband type of connection usb 20 suitable for pc laptop talking time 9 h standby 38 h features microphone noise reduction adjustable headband volume control range 150 m charging time 120 h