The Digital Reference DR-3500 Instrument Wireless System is a low-cost UHF system with many high-end features. Automatic frequency scanning, clear sound, dependable performance, true diversity operation, Tone Lock squelch for interference rejection, soft touch controls, an LCD display, and both balanced and unbalanced outputs. All 10 user-switchable channels are compatible for easy use with multiple systems. System includes receiver, rackmounting kit, instrument cable, and bodypack transmitter.