The wheel is perfect and very handy to manually pan or tilt the camera. The radio module serves several purposes. One of them is a good base for installing Osmo Pocket (OP) on flat surfaces. Second, it quickly establishes a Bluetooth or Wi-Fi connection between the OR and your mobile device, allowing for remote control and making photography very flexible. Thirdly, you can also charge the OP via the wireless module. The mounting bracket is convenient for other accessories. Nice extension, but a bit too expensive in my opinion.