Rebaydo 1pc 6-30V P15D-30 2331 LED Forward Firing Headlight operates from 6 to 30 volts with non-polarity operation for both positive ground and negative ground electrical systems. The forward firing design projects light directly onto the road without depending on the reflector, while the adjustable beam focus can be fine-tuned using the included Allen wrench through two adjustment holes. The bulb features contacts rotated 90 degrees for compatibility with 2231 bulbs, delivers up to 30,000 hours of service life, measures approximately 1.06" in diameter and 2.51" in length, and draws up to approximately 1.050 amps on both high and low beam at 6.8 volts. This is an NCNRNW product, meaning Non cancelable, No Returns, No Warranty. The reason it is classified as NCNRNW is that the P15D-30 flange may break when inserting the bulb into a P15D-30 socket, so extra care should be taken during installation. This is not a standard P15D-30 base, please see diagram to determine which base is required for application.