US Robotics 5630G. Modem speed: 56 Kbit/s, Interface: RS232/V.24 - DB25. Operating temperature range (T-T): 0 - 50 °C, Operating relative humidity range: 20 - 80 %, Storage temperature range (T-T): -20 - 70 °C. Power supply type: 9Vac 1A. Dimensions (WxDxH): 152.4 x 114.3 x 34.9 mm. Package dimensions (WxDxH): 215 x 170 x 65 mm, Package weight: 200 g