Used Ocean Reef GSM Mercury Communications Unit Condition:Very Good Additional features include a High

Additional features include a High Flow Purge with a large diameter purge valve for quick clearing

This light also features a built-in Blue and Red LED function

and adjustable suspenders for a tailored fit across conditions

The magnetic end-stopper prevents unwanted rattling when you need to keep quiet

perfect for both recreational scuba diving and spearfishing

Used Ocean Reef GSM Mercury Communications Unit Condition:Very Good Additional features include a HighThis unit is blending four different OCEAN REEF units into one: the extended range of the Gpower, the like stereo sound of the GSM SL, the clearness and double channel option of the DC and the battery life of the Gdivers.