Equipped with features like programmable, silent membrane switches, logic inputs and outputs, and LED indicators, Microflex Boundary Microphones are the high-quality solution for a range of applications such as altars, boardrooms and distance learning centers.A rubber strain relief is provided for applications that require removing the 4-pin mini connector and connecting the mic cable directly to screw terminals in the preamplifier. Includes attached 4 meter (12 ft) cable terminated with a 4-pin mini connector and separate preamplifier. 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.