External Microphone 3.5mm For Android Car Stereo Microphone works with most car radios with 2.5mm input. Replacement microphone features fast and accurate data transmission, efficient and clear voice transmission during use ideal for voice capturing, clip the microphone head on the sunvisor of your car or any other location you can mount the included clip holder package X Microphone Length 3 M (9 Feet) Includes Dash Mount & Visor Clip.