The Debra Audio VM302 VHF Wireless Microphone System with Dual Handheld Mic has an operating range of 80 meters and two channels. It features a frequency response of 40HZ-18KHZ and a signal-to-noise ratio of >103dB. The system operates in VHF band with a frequency stability of ±0.005% and a harmonic radiation of <63dBm. The microphone requires 4 AA batteries and has a battery life of up to 8 hours. The system includes a receiver, two handheld microphones, power cord, audio cable, and English instruction manual. It is suitable for various scenarios like family karaoke, conference speeches, and wedding hosting.