The grip can double your camera's battery life by inserting two lithium batteries. Prolong the shooting time effectively, especially for the events like wedding or sports photography, etc.It can also make shooting in protrait mode, which enables you to make shots vertically and comfortably.Tripod mount on the button is to be installed on the tripod or monopod, coupled with wireless remote control, shooting would be easier than ever.Works with Sony VG-C2EM batteries.The battery grip is suitable for the following cameras models:A7 IIA7R IIA7S IIPackage include:MEIKE A7II Pro Vertical Battery Grip (not including battery)Wireless Remote ControllerWarranty: 12 monthsManufacturer: Meike