Usage Tips:Features: brand and high quality Car external microphone mic is an optional external microphone for selecting audio system with built-in bluetooth-compatible module. This 3.5mm car external microphone mic will provide you a better anti-noisy environments. Plug and-play with long cable long distance 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, the voice clearly and stably under kinds driving occasions. Specifications: Item: Adhesive Microphone Model: 50Hz - 20KHz Size: approx 9.7x6.7mm/0.38x0.26in Sensitivity: approx - 32dB Directionality: omnidirectional Wire diameter: 2.5mm shielded wire Applicable to: car Bluetooth-compatible voice call ,car GPS monitoring intelligent voice system, voice transmission Function: This microphone can be glued to the dashboard or sun-visor, rearview mirror etc Cable Length:Approx 1M/39.37in Note: 1.Due to the light and screen difference, the item color may be slightly different from the pictures. 2.There are 1-3cm difference according to manual measurement.Thanks for your understanding. Package includes: 1 x 3.5mm Car External Microphone