BT21 is a compact and high brightness mountain bike lights. A quantum leap in bike lights, resulting in an all-in-one illumination tool that combines high-output LED technology and variable lumen output. It also has a built-in strobe light, plus a fuel gauge that tells you how much battery power is left. BT21 is the ideal illumination gear for mountain biking, touring, commuting, etc.
• Utilizes two cree XM-L2 neutral white LEDs, max 1800lumens output
• Powered by four BAK 18650 rechargeable Li-on batteries,7.4V 5200mAh
• Uses high quality optical lens with smooth beam
• 5-mode electronic switch-low-med-high-turbo-strobe
• Digitally regulated output-maintains constant brightness
• Overheat protection function
• 4-color & 5-mode LED indicator displays remaining battery capacity
• Quick to attach and detach using O-ring mounting straps sized for 20mm-35mm handlebars
• Gopro adaptor included
• Made of durable aircraft-grade aluminum
• Premium type III hard-anodized anti-abrasive finish
• Water resistant
• 52.8mm(width)x24.5mm(depth)x37.5mm(length)
• 65gram(excluding batteries and accessories)