Universal Voltage Compatibility: Engineered to accommodate a wide range of electric bikes, this LED headlight operates efficiently across a voltage range of 36‑72V. Integrated Horn for Enhanced Safety: Equipped with a built-in warning horn, this headlight not only illuminates your path but also ensures your safety while riding at night. Exceptional Brightness with Energy Efficiency: Featuring high-quality LED lamp beads, the headlight provides a powerful12W output with a broad lighting scope. Easy Installation with Clear Wiring Instructions: The headlight comes with a straightforward wiring setup involving a for the lamp, a black line as the ground wire, and a green line for the horn. Material: ABS Core: three-core Size: about 70mm x 74mm Voltage: 36-72V Power: 12W Decibel: 80-100db Wire length: about 145mm Color: Black Package Contents: 1 x Cycling LED Light Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.