Specifications: Product model: 3.0mm1.5mm 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, please contac us. Sensitivity: -38dB~-62dB=(0dB=1v/pa.1KHz) Impedance: 2.2KΩ