Enhanced Visibility and Safety: Our intelligent bicycle tail light utilizes advanced sensor technology and the best COB LED, providing an astonishing brightness of up to 65 lumens. With a wide field of view of 180 degrees and a visibility range of 150 meters, this tail light ensures optimal visibility even in challenging conditions such as rain, fog, snow, or pitch-black nights.is a high-quality and versatile safety accessory for your bike. Versatile Lighting Modes: Choose from our selection of 6 intelligent lighting modes to suit your preferences and cycling needs. Options include stable illumination, breathing flash, slow flash, rhythm flash, economical flash, and fast flash. Experience ultimate flexibility and adaptability on the road.Smart Automatic Functionality: Equipped with intelligent motion and light sensors, our bicycle tail light automatically detects day and night conditions. It switches on/off accordingly, conserving battery power when the bike is stationary and instantly activating when movement is detected or darkness falls. Enjoy effortless convenience and energy efficiency.Weatherproof and Durable Design: Crafted from aluminum alloy and ABS materials, our tail light boasts an IPX5 waterproof rating, ensuring reliable performance in any weather condition. Ride with confidence, knowing that your tail light is built to withstand the elements and provide long-lasting durability.Convenient and Long-lasting Battery Life: With a USB-C interface for easy charging, our bicycle tail light can be fully charged within 1.4 hours. Depending on the selected brightness level and mode, it offers an impressive continuous usage time of up to 26.5 hours.