Description: Material: high-quality ABS+PC material, anti-drop, scratch-resistant, long service life. Wick: Multi-light source lamp bead design, equipped with LED+SMD lamp beads, high brightne, pure color rendering, long life and stable light source output. Charging method: diversified USB charging system, compatible with multiple charging methods, convenient and practical. Illumination mode: 5 levels adjustable (main light: white light strong light/white light low light; secondary light: red and blue flashing/white light strong light/white light weak light) The light can be changed according to different use environments, which is easy to use. One light for multiple purposes: This product can not only be a bicycle taillight, but also can be used as a helmet light, backpack light, shoulder clip light, running light, night running light, warning waist light, etc., which can meet multiple purposes at one time and is convenient and practical. Suitable for: running, fishing, cycling, climbing, dog walking, patrolling and other outdoor scenes. Specification: Name: Bicycle warning light Material: LED, plastic, electronic components Light source: white light \ red light \ blue light, SMD LED (standard version 10 beads, preferred 18 beads) Mode: 5 lighting modes: red/blue flashing, white main light is always on (strong light - weak light), white auxiliary light is always on (strong light - weak light) Application: safety warning/close lighting Controls: On/Off, Manual Control (No Smart Mode) Battery: Li-polymer 450mAh; battery life about 6-10 hours Charging: Type-C charging port, 5V 0.5A charging time about 3 hours Fit: diameter of round tube 20-32mm; mounting ears (width*thickne) no more than 35*2mm Installation; seatpost, front handle, front and rear fork tubes, belt, backpack with hanging lugs, helmet, etc. Net weight; about 22 grams Note: White light is used for warning and short-range lighting, and cannot replace headlights for road lighting Size: 7*2.5cm Packaging: 1*tail light, Notes: 1. Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you! 2. Please allow 0.1-2cm measuring deviation due to manual measurement.