The item you purchased is a Pro Battery Grip for the Pentax K10D/K20D, has the same function as D-BG2. It can hold one D-Li50 battery simultaneously- Doubles the battery capacity of your camera. Vertical shutter release button on the Battery Grip makes shooting with the camera in a vertical position much easier. It retains the tripod mounting thread as well, keeping the important ability to stabilize the camera during critical shoots.

In this professional edition, it comes with several functional buttons as the flash above showing. It will be much convenient while using. It provides additional shutter release, AF point selector/ Magnify button, AE lock / FE lock / Index / Reduce button for easier vertical shooting.

Key Feature
Size: 141x73x43mm
Weight: about 0.32kg
Color: Black
Material: fireproof ABS

Package Include:
. For Camera Pentax K10D battery grip (PCB, Shell, needle protective cover etc)
. Battery Holder for D-Li50 batteries
. Original Manufactory Package
. English Manual