Nady DKW-3 GT/P VHF Single Receiver Bodypack/Instrument System Vhf single receiver Body pack instrument system Vhf (170-216 MHz) operations for reliable, interference-free performance 150+ ft. Typical operating range  up to 300+ ft. Line-of-sight Advanced audio processing circuitry for a wide dynamic range  no overloading for loud inputs or background hiss during quiet use This is a single fixed-frequency wireless system. Please consult the manufacturer to confirm compatibility when attempting to use two or more of this system simultaneously or use it with other wireless Systems