Features:100% brand new and high qualityUSB rechargeable taillightscoloras shownsize:8.5x2.5cmlithium batteryLamp: Super bright LED headMode: always bright, slow cycle, burst flash, fast cycleApplicable diameter: suitable for within 4cm of the tubeUse time: 2 hours of charge, the use of up to 6 hoursHigh brightness LED lights, the use of rechargeable lithium polymer battery, automatically filled with electric cut off the system,.Smooth fashion design, sealed waterproof. Slender appearance with a prism-shaped road beam design,Ultra wide angle of the irradiation range, to provide more security protection. Newly designed elastic straps, speak solidMounted on a variety of different shapes of body diameterPackage Content:1 x USB rechargeable taillights