You are bidding on a lightly used Canon BG-E3 battery grip with box, warranty card, and instructions. I recently upgraded to a 40D and can't use this grip with that model. Works great!From the Manufacturer
The Canon BG-E3 Battery Grip is designed specially for the EOS Digital Rebel XT camera. The BG-E3 holds up to two NB-2LH battery packs or six AA batteries to offer double-length shooting time. The vertical shutter release makes shooting with the camera in a vertical position just as comfortable as shooting horizontally. This grip provides additional controls for easier vertical shooting including shutter release, AE lock/FE lock, index/reduce button, main dial, AF-frame-select button, and the aperture/exposure compensation button.