Overview: Input:DC 5 V Output: 1.4V 160m A AA 2, 1.4V 160m A AAA 2 The Charger can charge 1-4pcs AA/AAA Ni-MH rechargeable batteries, LCD battery display. Charging by IC control, with -V intelligent cut off the rapid charging function, automatic transfer to trickle-charging, insure ssafety usage. The LED will be on & show its background for 2 seconds afterconnected with the power source, then off. There is letter "CHG" showing on LCD after battery loaded. The word "ERROR" which means defective or non-rechargeable battery loaded would be shown on the corresponding posititon on the LCD if such kind of battery loaded. And the coressponding battery photo would flash. Over-discharge protect, constand current charging can keep battery life, and insure safety usage. Over-temperature protect: (gt;60 centigrade use) the battery & charger temperature is too high & it will auto-cut off charging, insure safety usage. Auto-identify function, indicate the non-rechargeable battery, short-circuit battery, defective battery, then the charger will not charge to protect using safety. Refreshing battrey function:if the battery voltage getting less (0-0.9V), charger can refresh the batttery. Short-circuit protection: avoid the battery polarity " /-" short-circuit protect. Worldwide Voltage, Sutiable for the whole world. Specification: Weight Approx:27.3g Size Approx:10.5 x 3.3 x 2