Specification: Colour: Black Lamp beads: LED+SMD (red/blue) Charging method: USB charging Use battery: built-in polymer lithium battery Battery capacity: 800 mAh Charging time: 3 hours Working time: 1-2 hours Lighting 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) Waterproof grade: life grade waterproof (not immersed in water) Maximum range: 100-200 meters 1. Material: high-quality ABS+PC material, anti-drop, scratch-resistant, long service life. 2. Wick: Multi-light source lamp bead design, equipped with LED+SMD lamp beads, high brightness, pure color rendering, long life and stable light source output. 3. Charging method: diversified USB charging system, compatible with multiple charging methods, convenient and practical. 4. 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. 5. 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. 6. Suitable for: running, fishing, cycling, climbing, dog walking, patrolling and other outdoor scenes.