Features:This battery grip/holder is compatible with Canon EOS 5D Mark III Cameras.Features shutter release button， main dial， AE lock and AF point selection button for easier vertical shooting.Comes with battery holders for 2 * LP-E6 battery and 6 * AA batteries， effectively increase the camera operating time.Has a tripod socket. Specifications:Item type: Vertical battery gripCompatible with: For Canon EOS 5D Mark IIIReplacement: For Canon BG-E11Power source: 2 * LP-E6 battery and 6 * AA batteries(not included)Material: ABSOperating temperature: 0-40?? (32-104��H)Item dimensions: 153.4 * 116.4 * 85.03mm/ 6.04 * 4.58 * 3.35inItem weight: 369g/ 13.01ozPackage dimensions: 15.5 * 12.6 * 9cm/ 6.10 * 4.96 * 3.54inPackage weight: 461g/ 16.25ozPackage Contents:1 * Battery Grip 2 * Battery Holders 1 * User Manual