Features:
Waterproof up to 40m submerged, can be used in deep water.
Can used use two cameras at the same time.
With a clamp for you to use for smartphone.
Suitable for Gopro / Xiaomi Yi / SJCAM sports camera, etc.

Specifications:
Package Size: 15 * 13 * 3cm / 5.9 * 5.1 * 1.2in
Package Weight: 178g / 6.3oz

Package List:
1 * Shutter Trigger
3 * Screw
1 * Adapter
1 * Clamp