Questions and Answers for Ocean Reef M100 Portable Surface Transceiver Unit:
Is this unit compatible with the Ocean Reef GSM Dual Channel Communication Unit Dual Channel
Darrick (Certified Scuba Instructor at Scuba.com)
Hello Mark, yes you can use this with the GSM unit.
why do you need Wireless communication through a 30 foot transducer cable if is wireless? would you need to put the cable in the water to be able to speak to the divers?
Bob (Certified Scuba Instructor at Scuba.com)
Wireless in terms for scuba communication means you are not hard wired directly to the diver at all times. The cable with the transducer stops, but the diver can keep on diving beyond the limiting length of the transducer, wirelessly.