Aten VE550. LED indicators: Power. Operating temperature range (T-T): 0 - 50 °C, Storage temperature range (T-T): -20 - 60 °C, Relative humidity: 0 - 80 %. Operating voltage: 5.3 V. Dimensions (WxDxH): 79 x 73.8 x 24.4 mm, Weight: 140 g