Extend the Experience! The Battery BacPac attaches to your GoPro camera to double battery life*. Perfect for long duration time-lapse photo sessions, endurance motorsports racing or any application where you need up to 2X* the battery life. Compatible with all GoPro HERO2 and HERO3 cameras.What's Included:- Battery BacPac with integrated rechargeable Li-ion Battery, rear recording light and LCD display- Standard + Skeleton backdoor for use with water housing- USB cable- Protective Case