The Smart Tail Light is made of a durable combination of ABS, PC, and aluminum alloy for stability and long-lasting performance. It features two operating modesmanual and automaticeach with six selectable flashing modes: constant light, breathing flash, slow flash, fast flash, rhythm flash, and energy saving flash. In automatic mode, the light includes vibration sensing for intelligent control. The tail light has a built-in brake warning function that activates a high-brightness constant light for 3 seconds whenever braking is detected, enhancing safety during rides. Equipped with a built-in 350mAh rechargeable lithium battery, it supports USB charging and offers extended usage times: up to 17 hours on constant light, 20 hours on breathing flash, 28 hours on slow flash, 30 hours on fast flash, 30 hours on rhythm flash, and 54 hours on energy saving flash. Charging takes approximately 2 hours, with a green indicator light that flashes during charging and remains steady when fully charged. Designed with IPX6 waterproof rating, the light features a water-resistant construction suitable for rainy conditions, though prolonged use in heavy rain is not recommended. Key specifications: - Material: Aluminum alloy + ABS + PC - Brightness: Up to 60 lumens - Illumination distance: Over 500 meters - Beam angle: 220 degrees - Waterproof rating: IPX6 - Light source: 20 pieces of 0603 high-brightness LEDs - Product dimensions: 51 x 33mm - Battery capacity: 350mAh Package includes: 1 x Tail Light 1 x Charging Cable