This is the GoPro MAX Dual Battery Charger and Battery Using USB Port

Features:

• Conveniently charges 2 MAX batteries using a USB port
• Optimizes charging so you’ll get a fully charged battery as quickly as possible
• Allows you to charge your spare batteries while you use your camera
• Dual LED lights display charging status of both batteries
• Includes a spare 1600mAh lithium-ion MAX Battery
• For faster charging, use it with the GoPro Supercharger (International Dual-Port Charger - Sold separately)

Power up two batteries and get a spare! Charge your MAX batteries using a USB port. The MAX Dual Battery Charger automatically prioritizes which battery gets charged first, so you’ll get a fully charged battery as quickly as possible. Includes a spare battery.