USB LED UV Ultra Violet Flashlight Blacklight Light 395nm Inspection Lamp Torch. 11mm Dovetail to 20mm Picatinny Rail Converter Scope Adapter Base Mount. -- This LED Strobe light only work for 12V. It can work for a car, motorcycle and 12V Battery, but cann't work for 5V USB Or 110-220V Power.
eBay