Features 1、External PC Material: The exterior of this mountain road cycling helmet is made of premium PC, which can prevent the head from being injured by falling rocks and other items. 2、Soft Interior: The inside of the bike helmet is made of EPS foam and sponge, which is comfortable to wear and can be worn for a long time. It provides better shock absorption during the first impact. 3、Adjustable Design: Bike helmet is suitable for adults and teenagers. The helmet has a convenient adjustable dial that turns on the back of the helmet to accommodate the built in helmet frame for a perfect fit. 4、LED Light: The bike helmet includes front and rear LED lights that can be charged via USB. It provides better protection and visibility for night riding. The lights have three modes, plus a rear turn signal, for a total of five modes. 5、Widely Used: The bike helmet has a removable, washable helmet pad. Designed for commuting and bike riding, suitable for electric scooters, road bikes, etc. Item Type: Bike Helmet Material: EPS Foam, PC, Sponge Helmet Battery Type: Lithium Battery (Shipped with Built in Battery) Helmet Battery Capacity: 300mAh Remote Control Battery Type: Button Battery (Shipped with Built in Battery) Remote Control Battery Quantity: 1 Piece Remote Control Battery Capacity: 80mAh Package List 1 x Bike Helmet 1 x Remote Control 1 x Data Cable 1 x Instruction Manual