Kryptonite Street F-500 Black 6 Front Rubber Strap USB 500Front Light Lumen output at high steady: 500 Total run time at high steady: 1h30 Compact, sleek design Robust safety features including daytime and nighttime 6 pulse modes Side illumination ports allow cyclists to be seen when riding across traffic lanes Fully USB rechargeable Memory function allows light to turn on at the last mode that was used TECH SPECS Primary Color Black Position Front Battery Type Li Ion Run Time Up to 1. 5h Bracket On