The GSM DC™ underwater transceiver unit incorporates the latest innovations in underwater ultrasonic 2-way radio communication. The unit features a digital driver for vocal message equalization, an automatic system for activating transmission (DAT™), and a double transceiver channel. The GSM DAT DC™ is designed for use on the Neptune full face masks, but can be used on any full face masks equipped with a standard DIN female connection. The standard frequency (channel 1) is the same for all Neptune System units, so it is possible to communicate with any other GSM DC™, GSM DAT™, GSM, M-101A receive units, M-105 Digital surface units, and all previous surface units (M-103, M-104, M-105). Underwater communication is accomplished through ultrasound and can be used in two unique modes, manual transmission mode and automatic transmission mode. To start communication in manual PTT (Push to Talk) mode, press and hold the “A” button (see picture) to transmit and release the button to receive. The “B” button activates and de-activates the automatic transmission mode, DAT™ (see later). The GSM DAT DC™ automatically begins receiving capabilities upon contact with the water.

• The GSM DAT DC™ is a dual channel (DC) unit
  Iis equipped with two transceiver channels. Any time the channel is
  changed, a recorded message informs the diver of which channel has been activated.
• Different diving groups to operate in the same area
  With limited interference and confusion.
• DSP microprocessor
  Removes distorted frequencies and making communication loud and clear.
• The Mask is NOT Include in the price