Specifications: 1) Input: DC 14.5V, 4.5A 2) Output: a) DC 1.4V 7,000mA (AA) x 4 b) DC 1.4V 3,600mA (AAA) x 4 3) Operating temperature: 0 - 35oC 4) Size (W x L x H): 75 x 120 x 39mm 5) Weight: 110g (charger only, batteries and switch power not included) 6) Charges 1 ~ 4 AA / AAA Ni-MH rechargeable batteries 7) 4 independent channels, 4 LEDs indicate charging status 8) Switch power, worldwide voltage 100 - 240V 9) Over voltage and over heat protection 10) Safety features: a) Voltage monitoring function: i) -?V control ii) Auto switch to trickle mode after fully charged b) Safety timer: auto cut off after 1 hours of standard charging c) Temperature monitoring function: over-heat protection d) Bad battery, alkaline and primary battery detection 11) Ventilation fan