Multitech MultiModem ZPX. Modem speed: 56 Kbit/s. Supported data transfer rates: 48, 33.6, 14.4 Kbps, Maximum fax transfer rate: 33.6Kbps. Operating temperature range (T-T): -5 - 60 °C, Operating relative humidity range: 20 - 90 %. Weight: 94 g. Certification: CE Mark Telecom: 47CFR Part 68, CS03, TBR21