Delta D-BG2 is a fully functional replacement for the original D-BG2 battery pack for Pentax K10D K20D.
The battery pack has a vertical shutter release button. Holds the D-Li50 battery and can store the camera remote control and memory card. The battery pack allows you to hold the camera better, improves the ease of use when taking pictures in a vertical arrangement. Of course, it has a tripod mount.