Features: Made of premium PC housing and high-density EPS foam, it can effectively cushion the impact in the event of collision and protects the heads. With multiple vents, it follows the principle of aerodynamics, allowing the air to circulate while riding, it is breathable and not stuffy. With front and rear LED lights for light, warning and turn signals, remote operation, easy switching, to ensure riding safety. Adjustable fixing system to help you adjust the helmet to the right size for a more comfortable fit. Detachable brim keeps the sunshine out and avoids glare. Lightweight adults cycling helmet that will not burden you, suitable for outdoor activities such as cycling, scooter, roller skating, etc. Specifications: Color: Black/ White/ Red(optional) Material: PC + EPS Battery: Built-in 3.7V, 500mAh Lithium Battery Item Size: 299 * 219 * 161mm/ 11.8 * 8.6 * 6.3in Item Weight: 382g/ 13.5oz Package Size: 275 * 240 * 165mm/ 10.8 * 9.4 * 6.5in Package Weight: 625g/ 22.0oz Packing List: 1 * Helmet 1 * Remote Controller 1 * USB Cable