SJ72 HD Mini Helmet 1080P Sports waterproof Action Cameras DV Camera video recorder Ultra small and portable; 170 Degree 12mega pixel A+HD wide-angle lens available for diverse needs of customers Built-in lithium battery;able to record while chargingWater proof up to 20 meters depths under the water Supports high capacity Micro SD Card TV/HDMI interface connect to HD TV set directly,Web camera function,Built-in microphone/buzzer/vibration motor