Features: Provide you with better sound quality during the transmission process, greatly improving the voice quality of the hands-free in-vehicle communication system Adopt electret capacitor box with high sensitivity, low impedance, anti-noise and anti-interference ability 300 cm (9 ft) long cable is used for long-distance transmission, the microphone can be picked up from the clip for best sound Data transmission is fast and accurate, ensuring clear and stable voice in various driving situations It adopts humanized design and U-shaped fixing clip, which is easy to install and reliable in use. The microphone can be glued on the wall, glass, car, door, etc. with stickers Specifications: Polarity mode: omnidirectional 3.5mm connector Sensitivity: -30dB+/-2dB Frequency range: 50Hz-20KHz Output impedance: ≤2.2kΩ SNR: 58dB Standard working voltage: 4.5V Working voltage: 1.0V-10V.DC Cable length: 300cm (9.84ft) Package Included: 1 x 3.5mm car mono microphone