Features13 modes. Long light, slow flashing and frequent flashing. Riding at night, while enjoy the tranquility of the night, you need a good helmet with rear taillight. 2Smooth air duct design. It conforms to aerodynamics and can effectively reduce wind resistance, making it easy for riders to ride. 3EPS foam material. Safe and durable, can effectively reduce the impact of collision. 4Ultralight helmet. It will not cause any burden on the rider's head during riding. 5Suitable for adult, men and women. Effectively keep user safe during cycling.SpecificationItem Type: BicycleHelmetMaterial: PC+EPSWeight: Approx. 370g / 13.1ozTail Light Mode: Press once to keep on, press again to flash slowly, press again to flash, press again to closeBuilt-in Button Battery CR2032 x 1, Capacity 200mAhPackage List1 xBicycleHelmet1 x Accessories