Neewer Vertical Battery Grip (Replacement for VG-C1EM) for Sony A7 A7r A7s DSLR Camera Compatible with NP-FW50 Batteries With vertical-shooting function. Two lithium batteries can be put into the grip, with make it have double power. With AF(auto focus)/MF(manual focus)/AEL(AE lock) functions. C1 custom function. With two wheels which are convenient for operation.