Referee communication systems

The YAPALONG - 4000 Referees Radio unit is a portable radio terminal used for creating an encrypted full-duplex communication system for up to 8 users without having to press a PTT button, or to broadcast to an unlimited number of connected units. With countless applications, the Yapalong system is ...

By: craigh2



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from Instructables: exploring - technology http://ift.tt/1BQZAvP