Cisco 877w. DSL connection type: ADSL. Flash memory: 24 MB, Internal memory: 128 MB. Operating temperature range (T-T): 0 - 40 °C, Storage temperature range (T-T): -20 - 65 °C, Operating relative humidity range: 10 - 85 %. Weight: 0.143 kg. Power requirements: AC 120/240 V, 50/60 Hz, Dimensions (WxDxH): 101.6 x 108 x 28.9 mm, Connectivity technology: Wireless