MINI MICROPHONE JACK 3.5 mm $ 26.19 Product Information: Advantages: high fidelity, low distortion, anti-interference, close-range radio, no need for batteries, compact body Frequency response 35 to 15kHz S/N ratio 75dbB SPL Sensitivity~ -40+3dB(0dB=1V/Pa,at 1KHz) Colorblack Packing: Microphone *1