???Intelligent Light Sensor??Built-in light sensor automatically turns the light on at night and off during the day, eliminating the need for manual operation ???Solar Powered??Equipped with a high-efficiency solar panel for eco-friendly charging during daylight hours ???Bright COB LED??Features a high-brightness red light COB LED lamp bead, providing excellent visibility for nighttime cycling ???Multiple Lighting Modes??Three lighting modes available: slow flash, steady, and fast flash, catering to different riding conditions ???Water-Resistant??IPX4 rated for water resistance, suitable for various weather conditions Specifications: ?Material: ABS engineering plastic ?Lamp beads: red light COB lamp beads ?Lumen: 250LM ?Battery: 3.7V 200mAh polymer battery ?Battery Life: 3 hours on high brightness ?Lighting mode: slow flash/medium bright/fast flash ?Waterproof level: IPX4 ?Product size: 78*31*56mm ?Product weight: 30g Package included: ?1 x Bicycle Taillight ?1 x Charging Cable ?1 x English and Chinese User Manual