Ultra-bright Lighting Mode: This super-bright bicycle tail light not only has a high-quality and large-capacity lithium battery, but also has five lighting modes, which visually remind you to keep away from passersby and increase safety. Super Convenient USB Charging Mode: low power consumption, long-life lithium battery can be charged within 2 hours using USB cable, WORKING FOR 5-32 HOURS,very convenient and practical. Ultra-wide Range of Use: It can be used for mountain bikes, bicycles, folding bikes, etc. It can help you when you are walking, jogging, camping at night, or need emergency on the road. Ultra-simple Installation: You can adjust the Velcro straps according to your needs. It can be installed on the handlebars and seats.