Dual Channel High-Performance VHF wireless microphone system, 50m operating distance, Pure quartz circuit guarantees stable performance, Circuit controlled switching noise elimination, ALC for low distortion, Audio companding technology for low noise and wide dynamic range, Effective feedback control circuitry, Low power consumption LED status indicator on both transmitters and receiver, Separate or mixed output, Authorized Internet Dealer, Squelch Control: Noise-Lock, Frequency Deviation: +/- 15kHz, Frequency Response: 60Hz-15kHz, Frequency Steadiness: +/- 0, 005%, S/N Ratio: >80dB, Total Harmonic Distortion: <0, 5%(1kHz), Number of Channels: 2 channels, Receiving Sensitivity: -80dBm, Operating Range: 50m outdoors, Receiver Power Supply: DC 12V/300mA, Transmitter Power Supply: 9V battery, Transmit Power: <10mW, Frequency Range: 174MHz-216MHz, Output Type: Separate or mixed output, SKU: TBALL9494