The Pentax D-BG6 Battery Grip is designed to facilitate vertical-position shooting and extend shooting time with the Pentax K-1 DSLR. The grip provides a shutter release button, a set of control buttons (AE lock, AF, ISO, exposure compensation, green), a preview lever, and dual electronic dials - just like those provided on the camera body. It also features the dustproof, weather-resistant construction identical to the K-1. In addition to the dedicated lithium-ion rechargeable batteries, it also accepts six AA-size batteries.