Lenovo IBM modem. Modem speed: 128 Kbit/s, Interface: ISDN, Type: Internal. Operating temperature range (T-T): 0 - 70 °C, Operating relative humidity range: 0 - 80 %. Dimensions (WxDxH): 54 x 5 x 85.6 mm. Built-in processor: Intel Pentium 133 MHz