The WCS-999 wireless microphone system is for use with video camcorders and portable audio recorders. The system features a transmission range up to 150 feet, depending on conditions, and a 900 MHz FM transmission for high-quality sound. The complete kit includes a lavalier microphone, transmitter, receiver and monitoring earphone, three channels with a selector switch for low interference and a compact, lightweight design.Features:Lets you record voices up to 150 feet awaydepending on environment and transmission conditionsIdeal for video camcorderscaptures the voices of family members on vacation, in sporting events, at recitals, birthdays and weddingsIdeal for Pressman portable audio recorderscaptures lectures and speeches, good for music and nature studySupplied lavalier microphoneis tiny and unobtrusive, clips onto shirt or tieBuilt-in windscreenhelps reduce the microphone's pickup of wind noiseElectret condenser microphone designfor high quality and small sizeOmni-directionalmicrophone pattern picks up sound from all directionsPocket-sized wireless transmitteris easy to hide, clips onto clothing for unobtrusive usePlug-in powerfor compatible Sony microphones, no need for separate mic batteryWireless receiverplugs into camcorder or audio recorder mic input; easily clips onto clothing, camcorder hand strap or shoulder strapThree transmission channelsenable you to choose another channel if you encounter interferenceMonitoring earphonelets you hear what's being recorded; plugs into wireless receiverMic mixinglets the camera operator and the subject both be recorded; requires a second microphone, optional, such as the Sony ECM-T145Compact, lightweight designthe antennas are built into the transmitter and receiver900 MHz wide FM transmissionfor outstanding sound quality, excellent frequency response (100 -- 15,000 Hz) and extended dynamic range (more than 78 dB)Switchable transmission channellets you choose the channel with clear, noise-free sound