Multitech MultiModem ZBA Desktop Business Modem (EU). Modem speed: 56 Kbit/s, Interface: RS-232. Upstream data rate: 0.048 Mbit/s, Downstream data rate: 0.056 Mbit/s, Asynchronous data rate: 230.4 Kbit/s. Operating temperature range (T-T): 0 - 50 °C, Operating relative humidity range: 20 - 90 %. Dimensions (WxDxH): 109 x 145 x 25 mm, Weight: 0.227 kg. Certification: CE Mark, FCC 15 B, EN 55024, cUL, EN 60950, UL 1950, CS03, FCC 68, TBR21