Feature: 
Dual slot design， you can charge 2 batteries at the same time 
Smart LED indicator shows the charging status 
Automatic constant current control， prevents battery from overcharging， short circuit， and electronic shock 
Compatible for Gopro Hero 4 Battery AHDBT-401 
Input : 5V 2A 
Output: 4.35V  800mA(X2) 

Package Content: 
1X Dual Charger (NO Retail Box. Packed Safely in Bubble Bag) 
1X USB Cable 

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