I currently have the Ocean Reef Raptor Full Face mask with the communications mounted on it. Does this surface unit contain everything I need to be able to communicate from diver to surface?
Marilyn S This will have all you need. If you want to talk with the surface the M100 will allow you to talk from the surface with any diver using an OCEAN REEF underwater transceiver (GSM Gdivers , GSM DC , GSM GPower etc. )
JEFF G Yes, just add a 9v battery.