IMPACT D 10 USB ML - EU II Monaural unified-communications headset for PC/notebook Answer/end calls, mute microphone and control volume directly from the headset 2-in-1 wearing styles (headband and ear hook) ActiveGard technology protects you from acoustic shock by preventing sudden sound surges Wideband sound for HD voice quality and a natural listening experience Digital Signal Processing (DSP) for natural audio Range: up to 180 m with line-of-sight connection, up to 55 m in office building Talk time: 8 hours Includes: headband, ear hook, quick start guide