4.0mm*1.5mm best omnidirectional microphone Anti-interference noise reduction Specifications: Product model: 4.0mm1.5mm Related product model: 4.01.3mm,4.01.5mm,6.02.2mm,6.02.7mm,6.05.0mm,9.74.5mm,9.75.0mm,9.7*6.7mm and etc..for more dimensions selection,