Receiver Signal/Noise Ratio more than 90dB Image and Spurious Rejection more than 80dB Receiving Sensitivity 10dBuv (Sinad=30dB) Handing Mic Transmitter Power 10mw Modulation Type FSK Max Deviation 25Khz Spurious Emission more than 40dB (With Carrier) Battery Voltage 1.5V AA x2 Continuous using 11 hours Transmission Delay <3ms Performance Carrier Frequency 470 588Mhz (Depends on the region) Frequency Stabilization Less than 30ppm Dynamic Range more than 90dB Total Harmonic Distortion Less than 0.1% Frequency Response 30Hz 20Khz 2dB Audio Output Level 400mV (Mix 200mV)