1. Top equipment for bicycle and outdoor climbing fans. 2. Adopts seven US XML-T6 LED maximum luminous flux: 5000lm. It is specially designed for the bicycle and outdoor climbing fans. 3. 3-mode smart circuit design: high bright 5000lm mid bright 4200lm fast strobe. 4. Power: adopts 6 x 18650 battery pack 2 series connection and 3 parallel connection design.6600mAh capacitycan provide strong power can work for 3 hours. 5. Charger: strong current charger has temperature protection over-charge protection and short circuit protection smart quick charge. 6. Aircraft aluminum alloy shell CNC processing anodic coating surface processing. 7. The connection cables all adopt 3.5mm diameter which are very durable and the link interfaces are very tight. 8. Back press switch: 3 on 1 off. 9. Aluminum alloy vacuum reflector light cup high temperature resistance anti-drop perfect light focusing effect. 90-degree beam angle is excellent for bike riding.