> Dual-channel design, two handheld wireless microphones can be used at the same time without interference > High precision quartz locking frequency Noise lock, to solve the general wireless receiver is not easy to overcome the noise interference > Ultra high sensitivity and high S/N ratio, long receiving distance, continuous tone, no drift Use the distance: Ideal environment up to 40 meters Carrier frequency range: 210 - 270 mhz Frequency response range: 80HZ-15khz ±3dB Harmonic interference ratio: >90dB Rf stability : ±0.005% S/N ratio: > 90 db Output strength: 0-400mV Total harmonic distortion : <0.5%