Shure MX418D/S

Push-to-Talk, Programmable Switch, On/Off, Mic Mute. Microphone Type. Electret Condenser. 123 dB (1 kHz, 1% THD, 1-Kilohm Load). 94 dB (1-Kilohm Load). 50 Hz to 17 kHz. 29 dB SPL (A-Weighted). Dynamic Range.