MX393 Micro flex Wired Boundary Microphones from Shure are equipped with features like programmable, silent membrane switches, logic inputs and outputs, and green LED indicators. The high-quality solution for a range of applications such as altars, boardrooms and distance learning centers.Includes: Surface-mount mic; miniature three pin connector, 12' XLR cable. LED logic input and switch logic output terminals for remote control or use with automatic mixers. Programmable membrane on/off switch plus LED on/off indicator. Balanced, transformer less output for increased immunity to noise over long cable runs. Flat frequency response across the vocal range for uncolored sound. Sleek, low-profile design for unobtrusive appearance.