One of the key features of the Gemini LAV- Headset VHF combo wireless system is its superior quality, single channel VHF receiver with a 100-feet operating range. This microphone system stabilizes within the frequency range 170-260 MHz. The output level is optimized with the single channel volume rotary control mechanism to provide an unbeatable experience each time you make use of this dynamic single-channel wireless system. Monitoring the signal strength of the sound is not an issue because of the straightforward super bright RF LED indicators that indicate the signal strength for your convenience. In addition, the standard ?-inch unbalanced output jack and lightweight headset/lavalier microphone for hands free operation with rugged belt pack transmitter makes it even easier to use this microphone system wherever you go whenever you need.