TELESIN Dual Slots Battery Charger USB Charging Double Charger for Gopro Hero 4Features: Brand: TELESINDual slot design、 you can charge 2 batteries at the same timeSmart LED indicator shows the charging statusAutomatic constant current control、 prevents battery from overcharging、 short circuit、 and electronic shockCompatible for Gopro Hero 4 BatteryInput : 5V 2AOutput: 4.3V 800mA(X2)Package Included: 1 x TELESIN Dual Battery Charger1 x USB CableDetail Pictures: