Cygolite TridenX LED 750 Li-Ion Triple H.B. LED System with Palm-Sized Li-Ion Battery Triple LED bike light with stem-mounted lithium-ion battery uses State-of-the- Art Cree XPG LED Technology for 750 lumens of LED light output On-Site Programmable (OSP) Technology - Program your preferred brightness settings directly to the light with the push of the button Cross-Fire technology crosses beams to maximuize beam width and depth for optimum riding visibility Runs for up to 2.5 hours on high setting and up to 12 on low Handlebar and helmet mounts included