**Note: Please contact us to discuss vehicle compatibility and to preview instructions. PROFESSIONAL INSTALLATION ONLY! This is a universal product and may or may not be compatible with your application! Many users have utilized this two-prong voltage converter to add USB power with autodimming-mirror enabled cars** The DT Universal Dashcam Adapter contains two prongs which slip firmly into the back of an electrical connector. Plug the black end into ground, and the red into 12V.