This is the Re-Fuel Go Charger with Rechargeable Power Bank Charge 2 Batteries Features: The Go Charger! Recharge your device up to 4 times per charge 5,200mAh/19.2Wh Charge one or two GoPro Hero4 batteries at the same time 2amp/10watt USB output for rapid charging Don&';t miss out on the perfect shot due to a dead battery! Always have portable, rechargeable power at hand with this awesome power bank from Re-Fuel.