Audio2000's 6952u UHF 200 Frequency Portable Wireless Microphone with Handheld UHF Band (551MHz - 581Mhz) with Selectable frequency that can be changed manually or automatically 100 Adjustable Channels per transmitter. These 100 have 6 subchannels each (Totals 1200 selectable frequencies to be help with fine tuning) One 3.5mm TRS earphone output and level control on the front panel & One 3.5mm TRS AUX output on rear panel Two independent balanced XLR output and one mixed unbalanced 1/4" output for your preference of connection Operating Range up to 300ft (within line of sight)