Features: brand new and high quality 3.5mm 2.5mm standard plug, plug and play. 3m length cable long distance transmission. New revamped design gives you better quality sound during transmission. Microphone can be picked up from the clip for the best sound effect. Adopting electret condenser cartridge with high sensitivity , low impedance , anti-noise and ant jamming capability. Microphone can be glued with sticker to the wall, glass, car, door, etc. With fast and accurate data transmission, guarantee the voice clearly and stably under kinds driving occasions. Highly improved the speech quality of hand free car kit communication system. Adopting humanity design with U shape fixing clip , is more easy to install and reliable to use. Specifications: Frequency response: 20Hz-16KHz Impedance: 2.2K Ω Signal to noise ratio: ≥ 58DB Current consumption: ＜ 500uA Mic core size: Ø 9.7X6.7mm Sensitivity: - 32dB ± 3dB (0dB=1Pa) Directionality: omnidirectional Plug: 3.5mm,2.5mm(optional) Channel: 2-pole mono Wire diameter: 2.5mm/2 core shielded wire Wire length: approx. 3m Package Includes: 1 x Car External Microphone Mic 1 x U Shape Fixing Clip 1 x Sticker note: Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!