This is an adjustable mount for the GTeng FPV watch to go on your radio.
(The watch and the directly connected mount can be removed from the rest of the mount by turning one of the little side pieces out of the way.)
(The strap has to be removed but keep the pins that hold the strap on. The pins will be used to hold the watch to the new mount.)
To remove the pins, use a razor knife or some other thin blade like object, and push on the little ring on the pin. The pin will compress into the wrist band. Then repeat that to put the pins back in the mount.
The mount connects to the lanyard loop on the radio. There is a mount base for either straight or horizontal lanyard loops.
You will also need 4 M3 screws and 2 M3 nuts to assemble this mount.