Technology Parameter 　 （Receiver）estrade （Emitter）in hand Carrier Wave Frequency：UHF500-550MHz Carrier Wave Frequency：UHF500-550MHz Frequency Stablity： 0.002% Frequency Stablity： 0.002% (Better 15ppm Quartz Control Fixed Frequancy） (Better 15ppm Quartz Control Fixed Frequancy） Receive Statosspe：2/Uv 　 Tone Distortion ratio：>80dB Frequency：10mV enantiomorphous Distortion ratio ：>80dB Electric current ullage：<25mA Doise Distortion ratio：>100dB Frequency Response：<40Db Audio outpu：0-300mV Frequency modulation(FM) Receive channel：2 channel Capacitive tone arm：600?supercenter Battery：1.5V*3 Energy consume:3W Antenna: hide type Electrital Source：DC12-18V 　 Antenna: unirersal coupling antenna 　 　 　 　 　 Integrated synthesis parameter 　 T.H.D:<1% 　 Dynamic Range：90dB 　 Audio Frequency Dynamic Range ：50Hz-20000Hz(+3dB) virtual recieve distance:>80m（the ins and the outs）