Product details: Brand: ROCKBROS Product name: Safety warning light helmet Material: PC+EPS Applicable head circumference: 57-61 cm Headlight position: front light/side light/rear light Charging method: Type C Weight: 340g Colour: Black, white, titanium, black-red gradient, black-purple gradient. Features: Front light, side light and all-round warning light: The ROCKBROS bike helmet is equipped with a built-in front light, side light and all-round warning light to increase your visibility and safety. The all-round warning light provides 360-degree warning, allowing other road users to see you clearly even in low light conditions. Adjustable modes: The helmet has various modes that can be adjusted to suit your needs. You can switch between three modes with a single, double or triple click. The light flashing patterns also differ in the various modes. TYPE-C charging and 1800mAh large battery capacity: You can conveniently charge the helmet with the included TYPE-C charging cable. Thanks to the impressive 1800mAh battery capacity, the helmet will last long enough to meet your daily needs. Streamlined design and ventilation system: The ROCKBROS bike helmet impresses with its modern, streamlined design, which is not only aerodynamic, but also enables optimum ventilation and air circulation. This ensures a comfortable riding experience. Removable inner lining for easy cleaning: The helmet has a removable inner lining that allows you to clean it if necessary. This not only ensures a clean and fresh inside of the helmet, but also long-term use. PC+EPS protection: The ROCKBROS bike helmet offers reliable protection through the use of high-quality PC+EPS material, which provides excellent protection in the event of falls and accidents.