EOS -800D is a two LP-E17 lithium batteries can be loaded in the battery compartment and handles.The batterypack and handle also equipped with a vertical racquet handles the shutter button, the product through the cableconnected to the camera shutter release connection, so as to realize vertical shooting the shutter button function.Make your shot in longitudinal and lateral shoot at the same operating mode. Before using this product,please readthe instruction manual carefully first. Please be sure to keep a good book, in order to later can consult at any time.Attaching to the Camera