Tiny but tenacious the stix comp tail light packs a 20 lumen punch that can be seen from multiple directions its wide angle light and six modesranging from steady to flash modes make you highly visible to drivers which will increase your safety and peace of mind while riding the tail light runs for up to 26 hours depending on mode choice and is charged easily and conveniently via usb 7 to 20 lumens output 29 hours to 275 hours runtime charge in the usb port of any laptop or phone ch