BK4936 Microphone – 1/2 inch free-field electret (prepolarized), for SoundPro Class 1/SE-401/SE-401-IS meters and NoisePro meter
BK4936 Microphone – 1/2 inch free-field electret (prepolarized), for SoundPro Class 1/SE-401/SE-401-IS meters and NoisePro meter