Clip on holder and clip assembly that attaches to the rear of the WM12 wireless module to allow it to clip onto a strap, harness etc.
This is a genuine Minelab spare part.
Booster - Booty Mk1
Booster - Booty Mk2 with bypass
Booster - Steelphase SP01
Headphones - CTX3030 Waterproof Koss