The M100 G.divers is a portable surface transceiver unit designed for easy communication with divers in action. This compact unit can be worn on the operator's belt and is similar in size to a cellphone. It features a PTT button and a headphone/microphone connector, turning on automatically when connected and off when disconnected. With a 10 meter transducer cable that can be controlled for depth, this unit operates on one channel and uses a replaceable alkaline battery with approximately 9 hours of autonomy. Its range of operation is approximately 200 meters.