The Sony VG-C3EM Battery Grip is specially designed for the Sony Alpha A9, A7 III en A7R III system cameras. The battery grip has room for two Sony NP-FZ100 batteries. It does not only provide a better grip on the camera, but also makes both horizontal and vertical photography much more convenient. The VG-C3EM Battery Grip has extra control buttons, like a shutter button, a dial and AE/MF button. Have easy access to the most important functions while recording in portrait mode. The grip has room for two NP-FZ100 for extra long photography sessions. You do need to remove the battery cover to connect the battery grip to the camera. Simply open the battery cover of your camera and pull on the black slide on the inside.