With high-tech Japanese cells, rechargeable Li-ion batteries for longer battery life, equal or exceed OEM battery Simultaneous Charging: The only GoPro battery charger that lets you charge two GoPro Batteries at the same time. Compatible with GoPro HERO4 and GoPro AHDBT-401, AHBBP-401 Camera Compatible With: Battery Compatible with: GoPro AHDBT-401 AHDBT401 GoPro HERO4 Silver GoPro HERO4 Black Charger Compatible with: GoPro AHDBT-401 AHDBT401 Attention: 1. The battery must be FULLY charged before first use. 2. The battery is stored in a cool and dry place. 3. Do not Separation, extrusion,and impact. 4. Do not put battery into water and fire. 5. Keep away from children. USB Dual Charger can charge 2 at once. Using own usb adapter In the Box 3 x Enduro ADHBT-401 batteries 1 x USB DUAL CHARGER with screen (no adapter, use your own handphone charger) 1 x USB cable