Devolo MicroLink ISDN Industrial modem 64Kbps. Data link protocols: V.120, X.75, X.75/T.70NL, V.110. Modem speed: 64 Kbit/s, Connectivity technology: Wired, Interface type: V.24/ RS-232. Storage temperature range (T-T): -25 - 85 °C, Operating temperature range (T-T): 0 - 55 °C. Weight: 0.3 kg, Dimensions (WxDxH): 108 x 135 x 36 mm