Black Office/Call center Head-band Headset Wireless 120 m Supraaural 150 - 7000 Hz 6491 dB Microphone type: Boom -30 dB Performance Country of origin China DECT connectable Yes Product colour Black Headset type Monaural Recommended usage Office/Call center Wearing style Head-band Product type Headset Ports & interfaces Wireless range 120 m Connectivity technology Wireless Headphones Headphone sensitivity 91 dB Impedance 64Headphone frequency 150 - 7000 Hz Ear coupling Supraaural Microphone Microphone noise-canceling Yes Microphone direction type Unidirectional Microphone sensitivity -30 dB Microphone frequency 100 - 10000 Hz Microphone type Boom Battery Standby time 33 h Battery recharge time 3 h Talk time 8 h Operational conditions Storage temperature (T-T) 0 - 60 °C Operating temperature (T-T) 10 - 40 °C Weight & dimensions Weight 80 g Height 30 mm Depth 165 mm Width 165 mm Packaging data Package weight 80 g Package height 35 mm Package depth 180 mm Package width 200 mm Logisti