The condenser microphone is using an electronic circuit to control the whole, good cardioid pickup output, and sensitivity, low noise, wide dynamic range, which is widely used in recording studios, radio, stage performances, film, and television post-production works and other for specialized applications. The BM-700 Condenser Microphone is ideal for radio broadcasting studio, voice-over sound studio, recording. With a cardioid (uni-directional) pick-up pattern that isolates the main sound source and minimizes background noise, highlighting the performance. When connected to a laptop computer, please connect the laptop to the electrical outlet, or use a 48V phantom power to get enough power if the sound is not clear and high enough. If your device could not provide enough power (When use