Jabra Evolve 20 MS Stereo Display technology___Crystal LED 5 W Energy efficiency class 507024 00250 5 W Energy efficiency class (SDR) F Energy efficiency class (HDR) G Energy consumption (SDR) per 1000 hours 77 kWh Energy consumption (HDR) per 1000 hours 118 kWh AC input voltage 220 240 V AC input frequency 50 Hz Energy saving mode Yes Energy efficiency scale A to G Weight & dimensions Width (with stand) 1224 mm Depth (with stand) 275 mm Height (with stand) 737 mm Weight (with stand) 19 kg Width (without stand) 1224 mm Depth (without stand) 34 mm Height (without stand) 707 mm Weight (without stand) 17 Get more done with the blue optical sensor that allows you to work on most surfaces SBC Headphones Maximum input power 10 mW Ear coupling Supraaural Headphone frequency 150 7000 Hz Impedance 32 Ω Headphone sensitivity 93 USB controller– (call control unit) Protective pouch No 2 ear cushions included Foam size L Call management Remote Call Control (RCC)