The Panasonic DMW-BG2 Battery Grip for Lumix S1R II adds security and comfort for vertical shooting while holding an additional DMW-BLK22 rechargeable lithium-ion battery for extended operating times. Users benefit from quick access to essential functions like a secondary shutter button, joystick, additional dials, and more. The grip is dust and splash resistant so you can still experience proper functionality in unfavorable weather conditions.