The Bicycle Helmet Light is a rear LED light designed for motorcycle and bicycle helmets, providing visibility and safety during nighttime rides. This USB rechargeable light features a compact size of 8.8cm*3.7cm*1.8cm and is made from durable ABS and PC plastic materials. With a working range of 2.6V-4.2V and a rated voltage of 40W, this black light offers a reliable and long-lasting illumination solution for cyclists and motorcyclists. Additionally, it comes with a manufacturer warranty of 1 month, ensuring customer satisfaction and peace of mind.