The Dual Battery Charger makes it easy for you to charge two GoPro Hero4 batteries simultaneously. USB compatibility enables you to use most USB chargers; for example, the GoPro Wall Charger, Auto Charger or a USB port on your computer. Perfect for when you want to charge batteries on the road or on the go. The LED indicator shows when the batteries are charged. Compatible with Hero4. An extra battery (1160mAh) for your Hero4 camera is included.