The ML1-SF is a low cost omni-directional microphone for use with I/P cameras accepting microphone level input signals. (PC compatible input). The attached cord is 6' long and comes standard with a stereo 3.5mm connector on one end. Microphone presses into a 7/16" hole drilled into dry wall, acoustic ceiling tiles, etc. The ML1-S's 3.5mm connector can be removed and the cord can be directly connected to cameras with terminal blocks.