D-Link 54Mbps Wireless VoIP Gateway. Management protocols: IP, TCP, UDP, ARP, HTTP, 802.11g/b. Dimensions (WxDxH): 192.5 x 118.4 x 31 mm. Power requirements: 12V AC, 1.2A. Operating temperature range (T-T): 0 - 40 °C, Storage temperature range (T-T): -10 - 55 °C, Operating relative humidity range: 5 - 95 %. LED indicators: Status/Alarm