The Sony ECM-DS70P is a low-profile stereo microphone for use with portable recorders with compatible stereo 3.5mm input jacks. Utilizing electret condenser capsules, the microphone features a unidirectional stereo pattern for capturing sounds situated squarely in the left or right channel, minimizing surrounding sonic activity and enhancing the quality of vocal or instrumental solo/ensemble performances. It uses plug-in power and thus requires no battery.At 10g, the stereo microphone is lightweight. It can connect directly to the 3.5mm input jack of your device, though its supplied 3.3' microphone cable gives you flexibility in placing the microphone in various environments. Its gold-plated plug ensures optimal conductivity and minimizes extraneous noise