Universal camera trigger / shutter release for many camera trays with dual hex bolt mounts; including Scubalamp TG10 and TG20/21. Can be mounted on either handle under dual hex screws. We personally like to use it on action camera setups to keep the subject in frame and system steady. 

Smaller the sensor, the more sensitive it will be to movement underwater.

The trigger allows the user to make adjustments in height, width, and forward/backward direction for contact with the shutter.