This is an O.E.M. authorized part officially approved for Panasonic brand Lumix S1 and S1R digital cameras. Provides a comfortable grip plus vertical grip shutter button. For extended shooting time, the grip holds one additional Panasonic DMW-BLJ31 battery for a total of 2 batteries when attached to a LUMIX S or S1R digital camera. To prevent system malfunctions due to an open battery door, the grip provides Hall IC open/close door feedback warnings. In addition to the vertical shutter button the unit provides an extra Fn button, joystick and Autofocus (AF) AF-ON button. When used in connection with the LUMIX S1 or S1R cameras, the grip offers splash**/dust/free-resistance. DISCLAIMERS: *One in the camera and another in the battery grip. To prevent damage, system malfunction, or voiding the units warranty, use only specified Panasonic batteries. KEYWORDS lumix, lumix s; panasonic lumix; panasonic accessory; lumix accessory; original accessory; battery grip; power grip; grip; lumix grip; panasonic grip; panasonic oem; lumix oem; dmw-bgs1r; dmwbgs1r; bgs1r; dmw-blj31; dmwblj31; blj31; full frame; full-frame; mirrorless; s series; lumix s1; lumix s1r; dc-s1; dc-s1r; s1; s1r