OCEAN REEF M105 Digital Dual Channel Transceiver Surface Unit with Battery Tester

This unit has the same characteristics as the M105 Digital, but with the addition of a second channel. The operator may easily switch from channel 1 to channel 2. When switching between channels, a recorded message informs the operator of which channel has been activated. The M105 Digital is a surface to diver communication unit which allows surface personnel to talk with divers in the water and vice versa. The unit uses a 6V DC lead battery, allowing up to 48 hours of operation, or may be hardwired to a 12V DC source. The system is activated only when the transducer is connected, preventing unwanted loss of battery power. To start communication, the transducer must be lowered into the water; the standard cable length for the transducer is 10m (33 ft). Transmission is activated by pressing the microphone button, which will emit a short beep letting divers know transmission is about to begin. It will return to receive mode when the button is released.