Kryptonite Alley F-800 & Avenue R-75 Set Black 6F/6R Combo Adjustable Strap USB 800/75Set of Front Light Alley F 800 and Rear Light R 75 Lumen output at high steady: 800 Run time at high steady: F800 1h30, R 75 2h 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 Rear light includes 6 modes TECH SPECS Position Set Light