... BLP-920) 1.PLL technology 2.ISO 9001:2000,Ultra-cardioid3.LCD display,mute control4.frequency:600-900MHzUHF Wireless ... can decrease noises and increase the dynamic range.5. Ultra High speed Microprocessor analysis of signal mass and control ... Frequency response50KHz-18KHz ±3dBRF output power10mWMIC pointOmni-directional, Cardioid, Ultra-cardioidDimension210*225*50mm PAYMENT:L/C,T/T,WESTERN UNION ...