Standard microphone is designed for exclusive use with chairman and delegate units of TOA conference system. It include ring type speech indicator light at microphone head showing operation status of chairman or delegate unit. It provides secure connection to chairman or delegate station utilizing XLR-4-32 connector with secure push lock. It is microphone shall be an electret condenser type and shall be unidirectional. It provide sturdy and adjustable gooseneck. Rated impedance shall be 1.8 kiloohms. Rated sensitivity shall be –37dB (1kHz). Frequency response shall be 100 to 13,000Hz. Finish of gooseneck shall be stainless steel, black.