Features Signal stability long distance receiving has strong anti jamming ability stable signal andDistance receiving distance of 30 100 metersNo noiseConstant frequency high quality middlehead high quality sound filtering system fundamentally solve the problem of screamingNo distortion strong pickup clear voice high efficiency anti noise 0 delay to make the whole voice smooth and undistortedTunable wide range of equipment support applications as long as the device with microphone interface can be connected to use Specification Silent control Lock NoiseFrequency offset 11kHzFrequency response 80Hz 15kHzFrequency stability 0 005 Signal to noise ratio 60dBDistortion 0 5 1kHz Number of channels two channelsSensitivity 70dB MUse distance 50 meters in the open areaReceiver power supply DC 12V 320mATransmitter power supply AA batteryFrequency range 200MHz 270MHzOutput mode independent and hybrid automatic selectionLauncherFrequency stability 0 005 Carrier output power 30mWSpurious emission suppression 40dBModulation method vhfMaximum modulation 75KHzPickup mode capacitive LWM 6188 C ReceiverReceive sensitivity 2VImage rejection 40dBAudio output impedance 600Audio output level 0 0 5VUse power AC220 240V 50 60HzPower consumption 1W Note This product does not contain batteries Two AA batteries need to be purchased by yourself They can be bought at the local hardware store Package Included 2 x Microphone1 x Receiver1 x Audio Wire Antenna1 x