ADVANCED CHARGING TECHNOLOGY- Long Lasting and USB Rechargeable 650mAh lithium battery that lasts up to 10 hours. Recharges using a Micro-USB cable that connects to any device with a USB port. Headlight LED indicator turns green and Taillight LED indicator turns orange when fully charged. IPX 4 WATER RESISTANT. SUPER BRIGHT & FOUR LIGHT MODE OPTION- Upgraded Cree LED Chips. The Headlight and Taillight feature a One-Touch switch with four different lighting modes to provide you with maximum visibility and extra safety. Adjusts to Full Brightness, Half Brightness, Fast Flashing, and Slow Flashing depending on your preference. EASY INSTALLATION- NO TOOLS NEEDED- Easy to mount or remove for they are equipped with silicone straps that can be stretched up to 4.72" fitting many size seat posts, handlebars, seat risers, backpacks, and helmets. VERSATILE, MORE THAN A BIKE LIGHT- Can be used as an emergency flashlight, keep it inside your car, basement, attic, and emergency kit. Use it when you're running, jogging, hiking, camping, walking your dog, cycling, changing a tire, nighttime family/kids activities, power outage and MORE Perfect gift for family & friends.International products have separate terms, are sold from abroad and may differ from local products, including fit, age ratings, and language of product, labeling or instructions.