This is a compact size LED torch for use on your mask, to illuminate instruments, etc.  The torch features a twist cap to turn on/off on the back and is supplied with a stainless steel clip for attaching to your mask strap.  It is constructed from Aluminium and matte black anodizing, the torch has a narrow white beam with a brightness of 200 Lumens (and is supplied with a red filter, to avoid blinding divers).

The torch functions on a single Alkaline AAA battery and lasts about 3 hours (following NEMA FL-1 standards); with a depth rated to 150m.