Jabra/GN Netcom Active. Interface type: 3.5 mm, Cable length: 1.25 m. Ear coupling: intraaural, Headphone frequency: 18 - 21000 Hz, Headphone sensitivity: 98 dB. Microphone sensitivity: -42 dB. Dimensions (WxDxH): 23 x 40 x 18 mm, Weight: 17.29 g. Operating temperature range (T-T): -10 - 65 °C, Storage temperature range (T-T): -10 - 45 °C