Protect your LNR MTR-3B v4 switches, screen and buttons with this magnetic cover. Simply replace the top corner screws with the included hex head cap screws. The new screws will position the cover to prevent any force on the radio top hardware. The included magnets in the cover will secure the cover to the installed screws. This design adds no extra bulk or size as it does not wrap around the edges of the radio face but rather is secured by the included hardware. Replace one screw at a time to install.