【3 Lighting Modes & High/Low Brightness Adjustment】This bicycle light comes with 4 LED lights, and with just one button, you can switch between three lighting modes: broad light, spotlight, and flash light, allowing you to choose the mode that suits your needs. When all 4 LED lights are lit simultaneously, the light is strongest, with the bicycle headlight's brightness reaching a maximum distance of 200 meters. The brightness of the LED lights can be adjusted in 2 stages, 50% and 100%, which is helpful for illuminating dark roads. 【5000mAh Battery & Battery Level Indicator】The high-brightness bicycle light has a built-in 5000mAh battery, taking 4-5 hours to fully charge, and can be used for up to 6 hours on a single full charge. It is very useful for outdoor activities and emergencies. The battery level is clearly indicated by the indicator lamp, so you don't have to worry about the power suddenly running out and leaving you in the dark. 【IPX5 Waterproof & Sturdy and Impact Resistant】Adopting IPX5 waterproof technology, the sealed design can easily handle bad weather such as rain. The main body is made of aluminum alloy, and the surface has been anodized, making it resistant to wear and corrosion. It can also be used as a flashlight, suitable for scenes such as excursions, outdoor activities, camping, exploration, night fishing, disaster prevention, car maintenance, and emergencies. 【USB Rechargeable & Adjustable Up and Down Angle, Easy to Install】USB rechargeable, so it can be charged repeatedly without the need for battery replacement. It comes with a bicycle seat clamp, and the bracket can be adjusted up and down, allowing you to freely adjust your preferred angle. When not in use, it can be removed from the bicycle and stored in a bag, preventing theft. 【Tail Light Included & Excellent Versatility】It is necessary to consider not only the front but also the safety of the rear. A tail light and headlight are included as a set, and the tail light has three lighting modes: constant light, fast flashing, and slow flashing, which is convenient to use. (Charging is done via a USB cable) Using the tail light and headlight simultaneously increases safety while riding. This light is suitable for various scenes such as road bike lights, camping, hiking, cycling, flashlights, and dog walking.