Compact pocket-portable and rugged design for universal use. Super bright rear bike light for universal fit. Nice packaging design for a perfect gift for you or your beloved. Waterproof Design. IPX4 waterproof: It can work normally under heavy rain and heavy fog. Convenient to carry: the base is easy to disassemble and install, it can be used as a glare flashlight when you need it. Environmentally friendly materials: environmentally friendly PVC materials, fast heat dissipation, protection of lights, and extended service life.