With the Bluetooth Shutter Grip mounted on your JOBY SeaPal Waterproof Case for smartphones, framing and capturing the perfect shot is easy. The ergonomic grip has a red shutter button that communicates with the camera of your smartphone inside the housing. You can aim and trigger the shutter with one hand. The Shutter Grip attaches easily to the SeaPal case with two screws and is powered by one CR123A battery for years of service.