Ocean Reef Alpha Pro X-Divers - Underwater Unit 2.02 headset, low profile, fully integrated, foldable, hardwired underwater communication unit. Waterproof piezoelectric speakers (X2) D Mic microphone Full duplex system Audio recall button 6 pin waterproof connector The unit itself is a hardwired comm. unit. Clarity of communication is outstanding Range depends on cable length Includes recall button Speaker and microphone as featured in all comm. units. The Underwater unit can be connected to any