Ocean Reef GSM Cube3Its the most versatile unit possible. Capable of communicating in three different ways: wireless, hard wired, VHF. It can be connected to the ALPHA PRO X DIVERS surface unit for cable hardwired communication full duplex, hands free communication. The unit is a permanent wireless unit. Always on receiving mode for any communication on channel 1 frequency. PTT button activates wireless transmission on channel 1. Six pin waterproof connection permits
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