Shop paul8319's closet or find the perfect look from millions of stylists. Fast shipping and buyer protection. Aside from outstanding lumen capacity and industry-leading usage time, the Recon HL1800 monitors ambient light to change output accordingly, helping to save battery power for when you need it. Shines brighter, runs longer and works smarter. Smart Mode light sensor monitors ambient light to adjust light output accordingly The Recon 1800 can pair with ANT+ compatible computers to view battery information on the computer screen.* ANSI certified lumens and run time Focused optics with side light design for over 270-degrees of visibility Heat-dissipating CNC-machined aluminum casing Power status indicator alerts remaining run-time before powering off Includes adjustable GoPro mount *Giant recommends operating the HL1800 in manual mode when using Garmin computers. Size: 103x32x47mm Weight: 190g without mount Colors: Black Output: 1800 lumens Runtime: High (1800LM) 1.5hrs, Middle 3.5hrs (900LM), Low 7hrs (450LM), Smart Mode Day (100LM>450LM) 40hrs; Smart Mode Night (900LM) 3.5hrs, Flash (100LM) 65hrs Battery: Li-Ion polymer battery (6400mAh) Water resistance: IPX6 Certifications: ANSI-Standard FL-1