Product DetailsnBrand: ROCKBROSName: Light helmet, Cycling Helmet, Bike Helmet, Bicycle helmetPower: USB chargingBattery: 2000 MilliampereTime: Mighty about 3.5 hoursLow about 7 hoursFlash about 12 hoursn nProduct Featuresn1. Ultralight, Integrally-molded, Insect net helmet2. Waterproof, Shockproof, Safetyn nAll-weather safety cycling helmetnWith CE certificationLED highlight taillight warningn nn nProduct informationn nnPC shell +EPS foamnOne-piece double protectionn nnSecurity guards in actionn nn nTilight integrated Eye-catching at nightn nn nFollow the light guarantee night cyclingn nn n3 Lighting modes button to switch easilyn n nUSB convenient charging 300nah long battery lifen nn nThirteen holes for ventilationnEnjoy the natural windnSweat does not stay at nightnThe inside of the helmet is easy to remove and wash through the hook bonded liningn n55-60cm Adjustable dit and wear safern nn nBody as light as a swallow safe and lightnweight only about 252g,it is not easy to cause head and cervical spine fatiguen n n n4 colors available free collocationn nn nPackaging displayn n