The TS1 Shutter Cable for GH-300T Pistol Grip Ball Head is a dedicated shutter release cable for select Sony cameras. The cable connects from the base of the pistol grip to the camera for remote shutter release via the trigger of this innovative grip head with built-in shutter release. The TS1 cable is not included with the GH-300T purchase, it is only available as an accessory. The TS1 Cable is Compatible with the Following Cameras: Sony A33, A35, A37, A55, A57, A65, A77, A99, A100, A200, A290, A300, A350, A390, A450, A500, A550, A560, A580, A700, A900; Minolta A7D, A5D.