The AV-LEADER TCM218i is a professional conference microphone featuring a back electret condenser element with cardioid polar pattern. It delivers a frequency response of 30Hz-18,000Hz and sensitivity of -65dB ±3dB (0dB=1V/μbar @1KHz). With an impedance of 600Ω ±30% at 1KHz, this aluminum-constructed microphone connects via a nickel-plated 3.5mm 4-pole plug. Designed specifically for conference applications, the TCM218i provides clear speech reproduction with effective rear noise rejection due to its directional pickup pattern.