The lezyne macro drive 800xl front light is a high performance multi purpose led cycling light this light has a compact durable and heat dissipating extruded and machined aluminium body ultrahigh output leds delivering up to 800 lumens in overdrive mode optional overdrive race mode toggles between overdrive and economy modes only mode memory function returns to selected mode after turning off enhanced mor maximum optical reflection lens with built in side visibility high speed 2 amp usb