Ocean Reef B2D – Boat 2 Diver – Key West Diver Recall SystemThis brightly thought suitcase holds all the needed to keep your submerged team of divers well under control. Warn your divers of hazards or weather changes Recall the divers to the boat Complete compatibility with all the OCEAN REEF product range. Suit up your boat with a professional, yet affordable diver recall set B2D Boat to Diver Includes: 1 M100: Easy to use portable surface unit PTT transceiver, just like a VHF radio. The unit turns on when