16-channel digital voice transmission system with 863-865 MHz frequency. Suitable as a tour guide system and for any other application in which a certain voice source is to be distributed to one or more receivers. It offers high resistance to interference due to digital transmission, high operating range, frequency range perfectly adapted to voice transmissions and parallel operation of up to 4 different channels possible without any interference. Extra small and lightweight transmitters and receivers. 16-channel miniature receiver supplied with matching clip-on earphone. Switches off automatically after not receiving an input signal for 20 minutes (power-saving function). It is equipped by LCD for indicating channel, carrier signal, volume and battery status, autolock function and micro USB charging connection for ATS-12CB, ATS-35CB or USB charger. Supplied with lanyard. Power supply via integrated rech. lithium battery.