The MX393 is a surface-mount condenser boundary microphone designed for boardrooms, alters, and conference room tables. It features a silent programmable membrane switch, interchangeable cartridge, Logic input/output, LED indicators, and miniature three pin connector. Available with cardioid, super cardioid, or omnidirectional cartridges.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.