USB rechargeable bicycle light. Easy to disassemble, suitable for camping, dog walking or outdoor adventure activities. Bicycle safety warning lights are used to remind cars/people behind. Universal design mount, one size to fit all guaranteed bikes, mountain bikes, large road bikes, city bikes, or any bike, including children's bikes. No matter what bike you ride, it is very cute Multifunctional, not just a bicycle light-can be used as an emergency flashlight, put it in cars, basements, attics and emergency kits. Use it when you are running, jogging, hiking, camping, walking the dog, cycling, changing tires, night family/children activities, power outages, etc. Enjoy greater visibility and comfort, knowing that you will be safe at any time of the day. The perfect gift for family and friends.