QFX M-336 is a wireless FM system that allows users to connect two wireless microphones to an amplifier or karaoke system. With a frequency range of VHF/FM 109-120MHz and a mobile range of 30M in good position, you can move around freely while using the microphones. The system features a sturdy build with telescopic antennas for enhanced signal reception and a clear LED indicator for power and signal strength. It operates on AC 120 60Hz power and uses 9V batteries for the microphones, providing long battery life of up to 30 hours.