The Utility Frame for ONE X2 from Insta360 is a protective cage with multiple mount types, including two 2-prong mounts. It has a fold-out 2-prong on the bottom and a second one that's removable. It can be attached to the left or right side of the frame. Between the two 2-prong mounts, the Utility Frame can be mounted vertically or horizontally on various 3-prong mount supports. There are also two shoe mounts, one on the left and one on the right side, for attaching accessories such as a light or mic. The removable 2-prong mount screws in over either of these shoe mounts, into dedicated screw holes. A lens protection cap is also included and attaches from above to cover the camera lens and protect it from the elements when the camera is not in use.
The camera inserts into the Utility Frame from above, via a top door that locks tight at the turn of a thumbscrew. The Utility Frame is made mostly of aluminum, and it leaves access to the charging port of the camera, so you can charge/power the camera without taking it out of the frame.