Working with Low voltage DC 12V 24V , widely used for Solar batery system, RV and boat lighting system, and currently transformer T20LED filment bulb , 360°lighting angle, 2700K soft white , 1W=10W incandescent Edison bulb replcement E12/E14) Base., convenient to install with screw.12V-24V is a safe voltage for human touch, reducing the risk of human body electric shock. BUILT FOR 12 VOLT NO TRANSFORMER NEEDED - For use with any low voltage DC 12 volt power source and handle unstable voltage spikes up to 12V/24V - which include and not limited to cars , boats , marinas , trucks , motor homes , RV , off grid solar systems , other renewable energy systems , theatrical productions , train , trailers , remote cabins , landscaping lighting and much more application NOTE:Do not use 110V-220V directly, it will explode. If your voltage is 110V-220V, please use a transformer to change the voltage.