WOO + YOU this is big
9-axis motion sensor. Detects the kinematic energy from your board to capture jump data.
Bluetooth. Wireless sync with your iOS device while on the beach - no computer required.
Waterproof. Completely sealed to protect against damage.
Shockproof. Designed to take a beating and keep on recording.
Corrosion-resistant. Four contacts on the device maintain their connection after repeated contact with salt water and sand.
For more info : http://www.woosports.com/device