1. Adopt high-brightness LED 4-speed emergency flash (plane mode: highlightlow lightslow flashflash, lenticular lens: highlightlow lightflash). 2. USB charging mode is convenient, it can be connected to the computer to charge or any plug with USB port, fully charged, and can be discharged continuously for about 6 hours. The automatic power-off system protects the bicycle light in real time. 3. Brightness of 50 lumens. 4. The lamp life is about 10,000 hours. 5. Small size, easy to carry and large illumination range. 6. Made of aluminum alloy, durable and has good thermal conductivity. 7. The integrated design has a good sealing process to ensure excellent waterproof performance. Specification: 1. Color: Red Light White light. 2. Lamp beads: COB lamp beads. 3. Material: aluminum alloy + engineering plastic. 4. Weight: 45g. 5. Charging time: 2-3 hours. 6. Life time: 2-8 hours. 7. Lithium battery capacity: 650mAh.