• Input: 12V/24V; Output: 5V/2.1A. Drill Size : 1“（25mm）fits most vehicles’ dash panel.
• Offers safety protection against overload, over-voltage, over-current, over-heat and short circuit. 
• Application - Add USB Charging port to your car, van, boat, marine, ATV, RV etc.
• Multi Installation Options - You may install it into the cigarette lighter hole. Or drill a 25mm hole for flush mount. Or surface mount it using the brackets and screws (Included); different rubber gaskets included for an optimal fitting.  
• Water & UV Resistant – Waterproof cover cap is included. And the mounting socket is UV resistant and the stiff rubber plastic cap fits snugly to prevent damage from extreme weather conditions.