Reboos Rear Bike Light [EX 120] Bright USB Rechargeable Bike Taillight Bike Night Light 120 Lumens High Intensity RED LED Back Light [Water Resistant] Easy Installation Cycling Safety Helmet Light USB RECHARGEABLE BIKE BACK TAIL LIGHT (LONG RUN -TIME) - Powerful Lithium Ion Battery inside. Stop wasting money replacing batteries. Charges quickly (approximately 2 hrs) using the included USB cable and any USB device (laptop or usb charger)! ADJUSTABLE ANGLES (180 DEGREE SWIVEL) FOR INCREASED SAFETY- Mount it Vertically or Horizontally, your choice! Built for night and the outdoors. Be seen and be amazed with the improved safety. Equipped with an improved 32 micro-LED Super Bright chips it provides an output of 120 lumens. Be seen from miles away! TOOL-FREE EASY INSTALL AND DETACH SYSTEM - Mounts and detaches in seconds. No tools required! Includes a one touch dismount button. Can be used as a helmet light for additional safety. Premium build quality. Impact resistant at 2 meters and built for performance. Water resistant rated up to IPX4. UNIVERSAL FIT - The Reboos EX 120 Bicycle Rear Tail Light fits seat bars up to 40 mm in diameter including brands like TREK, SALSA, JAMIS, SPECIALIZED, GIANT, DIAMONDBACK, SCHWINN, CANNONDALE, GT, SCOTT, MONGOOSE and others. Our Reboos EX 120 compliments our MAX 350 super bright Bike Headlight, try them together for improved safety and visibility! 100% SATISFACTION GUARANTEE - From Reboos. Love your EX 120 bike light or your money back. Covered by a no nonsense 1 year warranty. Try our cool bike lights today!