16-channel digital voice transmission system with 863-865 MHz frequency. Suitable as a tour guide system, trainer/student system and for any other application in which a certain voice source is to be distributed to one or more receivers. It features high resistance to interference due to digital transmisison and parallel operation of up to 4 different channels possible without any interference. 16-channel miniature transmitter, for microphone operation and audio line signals, with intercom function. It is equipped by switch for intercom function with the receiver ATS-22R, audio line input via 3.5 mm jack at the headset, LCD for indicating channel and battery status, Mute button and Micro USB charging connection for ATS-12CB, ATS-35CB or USB charger. Supplied with headset. Power supply via integrated rech. lithium battery.