Features1Made of PC housing and high-density EPS foam, it can effectively cushion the impact in caseof collision and better protects the heads. 2The helmet has front and rear LED lights, support 4 light modes, one button switching, you can choose according to your needs. 3With multiple vents, it follows the principle of aerodynamics, allowing the air to circulate while riding, it is breathable and not stuffy. 4Equipped with adjustable fixing system to help you adjust the helmet to the right size for a more comfortable fit. 5Lightweight Cycle helmet that will not burden you, suitable for outdoor activities such as Cycle, scooter, roller skating, etc.SpecificationPractical scooter safety helmet, breathable and comfortable, effectively protects the heads while riding. With front and rear LED light, 4 light modes for option, effectively reminding pedestrians and vehicle behind, making riding safer. Features:Made of PC housing and high-density EPS foam, it can effectively cushion the impact in caseof collision and better protects the heads. The helmet has front and rear LED lights, support 4 light modes, one button switching, you can choose according to your needs. With multiple vents, it follows the principle of aerodynamics, allowing the air to circulate while riding, it is breathable and not stuffy. Equipped with adjustable fixing system to help you adjust the helmet to the right size for a more comfortable fit. Lightweight Cycle helmet that will not burden you, suitable for outdoor activities such as Cycle, scooter, roller skating, etc. Specifications:Color: Black/ White(optional) Material: PC + EPS Size: S / M / L(optional) Battery: Built-in 750mAh Lithium Battery Front Light Power: 150W Rear Light Power: 314W Heads Circumference: S: 480-530mm/ 18.9-20.9in M: 540-570mm/ 21.3-22.4in L: 580.0-610mm/ 22.8-24.0in Item Weight: S: 325g/ 11.5oz M: 340g/ 12.0oz L: 360g/ 12.7oz Package Size: S: 265 * 210 * 160mm/ 10.4 * 8.3 * 6.3in M: 265 * 210 * 160mm/ 10.4 * 8.3 * 6.3in L: 275 * 220 * 165mm/ 10.8 * 8.7 * 6.5in Package Weight: S: 528g/ 18.6oz M: 550g/ 19.4oz L: 575g/ 10.3oz Packing List:1 * Helmet 1 * USB Cable 1 * User's ManualPackage List1 * Helmet 1 * USB Cable 1 * User's Manual