This ORCATORCH D550 listing adds a wrist-mount option to the compact, 1,000-lumen light. The magnetic tail switch operates the output settings, while the hand attachment can help keep the beam available when you're using clips, a slate or other equipment. The mount doesn't replace a sensible retention plan.
Fit the wrist attachment over your actual exposure suit and gloves. Check that you can reach the switch, move your fingers and release or reposition the light without help. Larger wrists and thick gloves may use more adjustment than the product photo suggests.
The D550 uses a compatible 18650 battery. Follow the matching manual for seals and charging, and carry separate backup lighting when your dive requires it. The goal is usable hands-free light without an awkward or overly tight mount.