Compatible with Alpha 7R V/Alpha 7 IV/Alpha 7 S III: Cage Kit 3668 includes a cage, a clamp for HDMI cable , and a top handle. It is designed to facilitate low-angle shots and protect the camera while offering a wide range of accessory mounts. It is designed for Sony Alpha 7R V, Alpha 7 IV and for Sony Alpha 7 S III | Two-point Locking: Mount camera onto the A7 IV cage with an integrated 1/4"-20 screw, and use the two side locking plates(one for Sony Alpha7S III/Alpha 1, one for Alpha 7 IV ) to prevent twisting. To use the side locking plate, please remove the split ring on the left side of the camera first. Please note that camera strap eyelet is occupied when using the side locking plate | All-round Protection: Adopted aviation aluminum and formfitting design for security and durability. The Alpha 7 IV cage features built-in protective pads prevent the camera from being scratched. It maintains access to the camera's controls and hot shoe and features when camera mounted | Multiple Mounting Points: The cage features one integrated shoe mount, multiple 1/4"-20 threads and 3/8"-16 locating hole for ARRI. The cage also has a built-in NATO rail on the side, and it also features strap slots for a separately available neck or hand strap. A magnetic flat-head screwdriver & Allen wrench is stored on bottom of the cage to secure the mounting screw | Ergonomic Top handle: The top handle feels comfortable and enables easy carrying and at a low-angle shot. It features 1/4"-20 threaded holes, 3/8"-16 locating for ARRI holes, built-in cold shoes for mounting other accessories like SmallRig monitor mount 2294 | For HDMI Cable Clamp: The clamp for HDMI cable, mounted onto the left side of the cage via one 1/4"-20 screw and two locating pins, prevents deflection and fixes cables with a thumbscrew to protect interfaces and ensure stability signal transmission. Please note that this cable clamp is not compatible with Sony Alpha 1.The Clamp for HDMI Cable interferes with the synchroterminal interface when used on the Alpha 7R V camera | Power Backup Solution: SmallRig NP-FZ100 camera battery charger set is available now, two 2040mAh(Real) rechargeable batteries and a charger brings long battery life for your videos and photos shooting, if you need a sufficient power supply, please search SmallRig NP-FZ100 Battery 3824