Cisco 1841 2-pair G.SHDSL. Flash memory: 32 MB, Internal memory: 128 MB. Power supply: 50 W, Input current: 1.5 A. Operating temperature range (T-T): 0 - 40 °C, Storage temperature range (T-T): -25 - 65 °C, Operating relative humidity range: 10 - 80 %. Weight: 2700 g. Dimensions (WxDxH): 343 x 274 x 47.5 mm, Connectivity technology: Wired, Input frequency: 50/60 Hz