The Pentax D-BG2 Battery Grip offers additional options to ensure maximum shooting performance for K10D and K20D cameras during continuous use. The grip connects a second high-capacity D-Li50 Li-Ion battery (sold separately) to the camera and includes an additional shutter release, a dial for selecting aperture or shutter speed, and other functional controls. especially practical for portrait photography. The ergonomic design of the grip ensures that the camera fits firmly and comfortably in the hand, and is weatherproof - just like the K10D and K20D cameras themselves. In addition, the battery holder provides storage space for an extra memory card and a remote control.