• Material: Lightweight Aluminum
• Weight: 4.4 oz rear, 4.1 oz front
• Dimensions: 4.2 x 1.9 x 1.7in
• Fits handlebars: 22mm-31.8mm
• Fits seat posts 22mm-31.6mm.
• Brightness: Standard: 150 front/30 rear, Boost: 300 front/60 rear
• Battery: USB Rechargeable, Removable Li-ion
• Run Time: Up to 24 hours rear. Up to 5 hours front.
• Modes: Boost, Steady, Flash, Eco-flash
• Warranty: Lifetime coverage against theft, breakage, water-damage

These lightweight aluminum lights lock to your handlebars and seat post with custom security bolts, and are guaranteed to last forever - If they're ever stolen, broken or water damaged, Fortified will replace 'em! Swap batteries on the go with removable, rechargeable USB batteries. 150 lumens in the front perfectly illuminates city streets, while 30 lumens in the rear keeps drivers alert. If you're looking to fully illuminate the darkest suburban paths and urban alleyways, try the Boost version with 300 lumens in the front and 60 lumens in the rear to keep drivers at a distance.

• USB Rechargeable
• Lithium-Ion
• Run Time: Up to 24 hours rear. Up to 5 hours front

To make sure you always shine, grab an extra rechargeable battery. We spent nearly 2 years engineering a custom cell that focuses on mililamp hours and circuit efficiency to minimize recharging.