The Olympus HLD-9 is a battery grip for the Olympus OM-D E-M1 Mark II digital camera. It provides a full set of vertical controls, plus a spot for an extra battery (sold separately) that can help extend continuous shooting time. And if you have an Olympus AC-5 adapter (also sold separately), you can use it to power the camera from an AC outlet. In excellent condition, with only very minor cosmetic wear.