Material: Integrated PC shell, effective impact resistance, wear-resistance and drop resistance. Thickened EPS liner with cushioning effect.
Lighting highlights: Equipped with illuminated headlights + warning taillights, the headlights are in constant mode, the taillights are adjusted in three gear modes, constantly on-fast flashing-explosive flashing, safer riding at night.
Battery: 750mah rechargeable lithium battery, USB charging mode, can be fully charged in 2.5h, the most power-consuming mode can last more than 10h.
Size optional: There are adjustable knobs on the back of the head, M: head circumference: 54-57cm, L: head circumference: 58-61cm. For a perfect fit, measure the circumference of the head starting in the middle of your forehead to ensure you choose the correct size.