Multitech MultiModem ISI. Modem speed: 56 Kbit/s. Supported data transfer rates: 33.6K, 31.2K, 28.8K, 26.4K, 24K, 21.6K, 19.2K, 16.8K, 14.4K, 12K, 9600, 7200, 4800, 2400, 300 bps, Maximum fax transfer rate: 33.6Kbps. Compliance industry standards: V.92, V.90, V.44, V.42bis,V.34, V.17, V.29, V.27ter, V.21, T.30, T.30. Operating temperature range (T-T): -5 - 60 °C, Operating relative humidity range: 20 - 90 %. Weight: 241 g