【DC 5V USB Input】 Boost up from 5v to 12v. This USB to Radar Detector DC3.5 Plug power cord is great for powering your 12V Radar Detector from a high capacity USB car plug. 【Stable Working Performance】 USB power input cable for DC3.5mm type radar dectector, upgrade chip provides better heat dissipation and ensures a stability of power transmission for your radar detectors.
eBay