✔ ADVANCED LED RECHARGABLE DESIGN: USB rechargeable bike lights, built in 650mAh rechargeable lithium battery for each light. ✔ FOUR LED LIGHT MODE OPTIONS: The Headlights and Taillights feature a one-touch switch with four different lighting modes depending on your preference. Included are full brightness, half brightness, fast flashing and slow flashing. ✔ EASY INSTALLATION: The silicone mounting straps are designed with two openings that fit tightly around most seat posts, handlebars, seat risers, backpacks, helmets and stretch to keep the lights secure and firm. They can be easily loosened and fastened. No tools are required. ✔ MUTIFUNCTIONAL: These bike light sets are versatile enough for cycling, hiking, camping, or any outdoor activity and can be also used as emergency flashlights. They are great for cycling at night or in places where visibility and safety are of concern. ✔ BUY WITH CONFIDENCE: We are committed to providing our customers with high quality products. We are dedicated to ensuring your fully satisfaction. ✔ WARRANTY - KEY WEST FLAGS stands behind all of our products! KEY WEST FLAGS bicycle lights come with a 1-YEAR free replacement warranty. ✔ USA VETERAN OWNED - These USB rechargable LED Bike lights are sold through KEY WEST FLAGS, a 100% USA veteran-owned small business. USB Rechargeable LED Bicycle Front and Rear Light Sets