The Sony VG-C4EM Vertical Grip is an accessory battery grip is designed specifically for the Sony Alpha a7R IV camera. Key features include:
Designed for the Sony Alpha a7R IV camera
Secondary shutter release and other added controls
Durable dust- and moisture-sealed build
Holds two NP-FZ100 batteries for double the life
Improved Ergonomics. The Sony VG-C4EM provides a more comfortable grip when shooting in the vertical orientation (portrait). It also adds a shutter release, two control dials, an AEL button, and three programmable buttons.
Solid Build. The VG-C4EM grip features the same dust- and moisture-sealed design as the Sony a7R IV.
Additional Power. This grip holds two NP-FZ100 batteries, which means you can get twice the battery life before you have to swap. You’ll receive one battery with the rental of this grip in addition to the one battery that comes with the camera you’re renting.