Shinmax Specialized Bike Cycling Helmet, Adjustable Road Mountain Mens Womens Bicycle Helmet With Taillight Turn Signals for Racing,Sleek,Safety Protection </b><br> USB Charging Shinmax bike helmet is a stylish and superior ventilate design that suitable for nearly any ride. <br> It is a multi-functional Smart Helmet which focus on Smart Lighting Turning Signal. <br><br> <b>Specifications: </b><br> Material: PC + EPS<br> Package Weight: 0.35 KG/0.77Lbs<br> Head Size: 52-58CM/20.86-24" inch<br> Tail Lights:steady, slow flashing and fast flashing, stay safe while cycling with the bike helmet.<br><br> Convenient:Lightweight integrally-molded bicycle helmet. Sturdy, high intensity. Easy to wear!<br> <b>Dear Buyer</b><br> - Thanks for your business!Your positive feedback and product review will be greatly appreciated!<br> - Of course,Our products supports Free Exchange and Refund!we believe that you will have a pleasant shopping experience at our store!<br> - If your have any questions,please ask us,we will response in 24 hours!