Nortel DR4001B73E5. Maximum data transfer rate: 0 Gbit/s. Switch type: Managed. Weight: 3800 g. Operating relative humidity range: 10 - 95 %, Operating temperature range (T-T): 10 - 50 °C, Storage temperature range (T-T): -20 - 70 °C. Dimensions (WxDxH): 44 x 442 x 256 mm, Connectivity technology: Wireless, Power requirements: 90-132 VAC/180-264 VAC, 50-60 Hz