The Insta360 ONE R Twin Edition is one of the key configurations of the modular ONE R action camera system. The Twin Edition includes the Core module, 4K Wide Angle Mod, Dual-Lens 360 Mod, and the necessary Battery Base that holds the modules together. The Core module, which is the brain, and any other module of your choice, mount side by side on the Battery Base. The different modules can be swapped in interchangeably next to the Core module. A 1" Wide Angle Mod, which captures 5.3K resolution video, is also available, sold separately, and can be swapped in. The ONE R allows you to approach different applications with one system. The Battery Base has electronic contacts that connect two modules to work together as one. Also included is a mounting frame with a standard 3-prong action cam mount. The entire setup fits into the frame in a compact form. This way it can be attached to various support accessories, including dedicated ones that were designed specifically for this ONE R system. The ONE R system is designed to be waterproof without any waterproof housing required. But it first has to be installed in the Mounting Frame. With the Core module and either of the other included modules attached to the Battery Base and then installed in the Mounting Frame, the system can be used in up to 16' underwater.