Tiny but tenacious the stix sport tail light packs a 14 lumen punch that can be seen from multiple directions its wide angle light and six modesranging from steady to flash modesmake you highly visible to drivers which will increase both your safety and peace of mind while riding the tail light runs for up to 18 hours depending on mode choice and is charged easily and conveniently via usb 7 to 14 lumens output 28 to 18 hours runtime charge in the usb port of any laptop or phone charg