Install the Vivitar Battery Grip for Panasonic G80 and G85 Cameras directly to either body by turning the thumb screw and tightening the grip against the body in the 1/4"-20 tripod socket. The grip accepts one DMW-BLC12 rechargeable battery which doubles the camera's battery life when there is a functioning battery inside the camera. The battery grip offers a comfortable, extended, rubberized, non-slip grip, and a shutter release button for vertical use. It also provides two thumb dials, an AE/AF lock button, and a multifunction button, so you maintain full function of the camera while shooting vertically. A DC power-supply socket next to the grip's battery chamber is available to use with the compatible DMW-AC8 ac adapter. The battery grip maintains tripod support with the threaded 1/4"-20 socket on the bottom, and a strap mount on the side, so a hand or shoulder strap can be securely attached.