5 to 30V positive ground or negative ground non polarity. P45t base. Made with 16 Cree 2525 LEDs. Available in 6000K to 6500K. Dual filament the low beam Lumens up to 1200. The high beam Lumens up to 1800. Long life 30,000 hours. Made with aluminum for long life. Uses only 800mA. Uses around 9.6 Watts. Constant current the driver to reduce flicker. The base is P45t. This led bulb is for old vintage and classic cars, trucks, motorcycles, and scooters. Long-life up to 30,000 hours. 8 LEDs on each side for best illumination. When looking at the connect from the rear the ground is the left-most contact. The center contact is the low beam. The rightmost contact is the high beam. Please click on the manual to see the wiring diagram for this bulb. 4 smd chips will be lit for low beam both sides and all 8 smd chips both sides will be lit for high beam. Made with 2525 led's for maximum brightness and long life. Dimensions are overall length is 2.52 inches. The width is 0.98 inches. Load equalizers may be required, if the bulb will not switch from low beam to high beam or if the bulb flickers when installed. Please install led light load equalizers to fix the problem product code 65832. This 3 prong connector will fit a standard H4 HB2 9003 3 prong female Socket for easy wiring. CE and Rohs.