M-105 Digital Transceiver Surface Unit w/ Battery Tester
M-105 Digital Transceiver Surface Unit w/battery tester allows surface personnel to talk with divers in the water and vice versa. 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.