Multitech MultiModem ZPX V.92. Modem speed: 56 Kbit/s. Supported data transfer rates: 48, 33.6, 14.4 Kbps, Maximum fax transfer rate: 33.6Kbps. Compliance industry standards: V.92, V.90, V.34, V.17. Operating temperature range (T-T): 0 - 50 °C, Operating relative humidity range: 20 - 90 %. Dimensions (WxDxH): 140 x 22 x 125 mm, Weight: 88 g