Devolo MicroLink 56k Industrial Modem. Modem speed: 56 Kbit/s. Data link protocols: V.17, V.21, V.22, V.22bis, V.23, V.27ter, V.29, V.32, V.32bis, V.33, V.34. Operating temperature range (T-T): 0 - 55 °C, Storage temperature range (T-T): -25 - 85 °C. Connectivity LEDs: TxD, RxD, DTR, DSR, RTS, CTS, DCD. Dimensions (WxDxH): 108 x 38 x 140 mm, Weight: 1 kg