"This pistol grip system for the Canon Housings is ideal for reaching extreme angles and getting that last minute shot. The switch is very sensitive and direct, which ensures no shots are missed and the grip has been redesigned to be lighter and more ergonomic in your hand. Includes all mounting hardware and wiring including the waterproof shutter release switch and cable release. Simple plug and play"" installation. The AquaTech Pistol Shutter Release offers a new, two button controls with dedicated focus control and shutter. Whether you are locking focus, tracking subjects or shooting manual focus, the two button control is the perfect accessory for those extreme angles achievable with a system like this."