.r2 {color#F00;}.r5 {color#F00;}:Worldwide voltage for 100-240V AC input. Micro-processor control -Delta V detection which automatically controls the charging process. Four independent charging channels for individual battery charging and detection. Constant charging current mode; trickle current when fully charged. Eight hours charging time cut-off to ensure safety.Operation Instructions:1. Insert 1 to 4 pieces of 1.2V AA/AAA rechargeable Ni-MH batteries into the battery compartment. 2. Make correct contact with polarity + and - according to the sign in the battery compartment.3. Before charging, insert the batteries into the channels then convert plug to charging position:- LED will light up in red to indicate proper charging. - When charging is finished, extract the plug and batteries. 4. When LED indicator changes from red to green, it denotes battery in that channel is fully charged.Easy-to-Read LED Indicators:LED Color Status Red Charging Green Fully charged and on trickle charging Red flash Bad/wrong battery Specifications Input100-240V ~ 50/60Hz 0.2A Output:AA 1.2V x 2 --------------1000mA AA 1.2V x 4 -------------- 500mA AAA 1.2V x 2 ------------ 500mA AAA 1.2V x 4 ------------ 250mABest use with Tenergy Centura Low Self-Discharge Rechargeable Batteries. Tenergy Premium Rechargeable Batteries.Download product instruction manual here.Warning:Don't disassemble the charger. Don't charge other types of batteries - it may cause explosion and breakage. The charger is only for in-house using and should be kept away from heat surrounding. Keep the charger away from humidity circumferences where no liquid is allowed to get in, otherwise it may cause damage and lead to accident. It should be placed out of children's reach. It may not be able to fully charge those batteries which have not been used for a long time. Several recycles of charge-discharge will improve the battery's performance. Charger shouldn't be treated as a toy - please handle with precaucious.No metal material is allowed to come in contact with charger, otherwise it can cause fire and injury.