the t.bone IEM 150 Set 863 MHz@+*Bundle offer comprising*, the t.bone IEM 150 - 863 MHz, UHF stereo In-Ear Wireless System, With a total of 961 frequencies, Up to 8 systems in parallel, Frequency range: 863 - 865 MHz, Stereo mix / mono operation, 9.5"" Transmitter in metal housing with integrated monitoring