Safety Standard: CE UL Voltage: AC 120V 60Hz or 220V 50Hz or 230V 50Hz Color: Black Packing: clamshell Meas(cm): 39.0?38.0?27.5cm N.W.(Kg): 7.5 G.W.(Kg): 8.5 Features: 1. 2pcs to 4pcs AA/AAA size can be charged at the same time 2. Charging current: AA size 250mA AAA size 100mA 3. Charging time : 5hour Automatic cut-off after 5 hour 4. LED indicator 5. Extend charge times significantly prolong battery life