Jabra Pro 920 Duo DECT-Headset f desktop NC Performance Product type:Headset Wearing style:Head-band Recommended usage:Office/Call center Plug and Play:Y Headset type:Monaural Colour of product:Black Ports & interfaces Connectivity technology:Wireless DECT connectable:Y Wireless range:120 m Bluetooth:N Headphones Ear coupling:Supraaural Headphone frequency:180 - 7000 Hz Impedance:64 Ω Headphone sensitivity:91 dB Microphone Noise-canceling:Y Microphone frequency:100 - 10000 Hz Microphone sensitivity:-30 dB Battery Talk time:8 h Battery capacity:650 mAh Battery voltage:7.5 V Standby time:33 h Base station Base station:Y Operational conditions Operating temperature (T-T):0 - 40 °C Storage temperature (T-T):-20 - 45 °C Packaging content Suitable for use in country/location:Europe