Plantronics voyager focus uc b825
Stereo pc headset design on ear type closed transmission mode bluetooth radio range 45 m operating time 12 h sound mode 20 hardware type of headphones headband features passive noise cancellation active noise cancellation control via headset padded headband adjustable headband led indicator volume control functions mute automatic shut off dsp technology hearing protection function number of drivers 1 microphone properties noise cancelling microphone