US Robotics Accessory Handset. Display: LCD. Dimensions (WxDxH): 154 x 48 x 28 mm. Package dimensions (WxDxH): 190.5 x 174.8 x 47.8 mm, Package weight: 0.47 kg. Operating temperature range (T-T): 0 - 50 °C, Storage temperature range (T-T): -20 - 70 °C, Operating relative humidity range: 20 - 80 %. Talk time: 10 h, Standby time: 120 h