THE LATEST VERSION: Our best-selling rechargeable rear bike light just got better An upgrade over the Guard G3X, the powerful Guard G3X Pro100 bike back light is now brilliantly brighter, easier to mount, IPX5 waterproof, has improved battery life, and better daytime visibility. EXTRA BRIGHT; EXTRA SAFETY: With a super-bright 100 LUMEN output, this bicycle rear light provides SUPERIOR DAYTIME VISIBILITY, has an extra-wide 180-degree beam angle for safe illumination at day and night, and 7 LIGHTING MODES to complement any time of day. IMPRESSIVE BATTERY LIFE: Unlike other cycling rear lights that quickly die on you, weve fitted our bike taillight with a POWERFUL 950mAh BATTERY that LASTS 2-45 HOURS; 90% longer than most competitors. Just connect the USB RECHARGEABLE red LED bicycle tail light to any USB port for a quick charge. FITS EVERY BIKE: Road bike or mountain bike, hybrid or commuting bike, this bicycle taillight INSTALLS IN SECONDS. Our all-new mounting system is easier to use than ever. Every kit comes with 4 silicone mounts and 4 different-sized mount rings for universal compatibility. DESIGNED TO LAST: Weve combined IMPACT-RESISTANT polycarbonate plastic with IPX5 WATERPROOFING to create a rechargeable bike tail light that holds up to all your adventures. Every light kit is backed by the 30-day no-questions-asked return policy and a year-long warranty. Get yours with complete peace of mind today.