Product name:bicycle tail light Product size about : 8.5*1.9*3.5cm/3.34*0.74*1.37in Product color: As shown in the figure Product material:ABS product features: 1. This USB rechargeable bicycle tail light is designed with IP43 waterproof rating, ensuring durability and functionality even in wet conditions. 2. With a maximum brightness of 15lm, this lightweight tail light provides optimal visibility and safety for cyclists, especially during low-light or nighttime rides. 3. The tail light offers a choice of three lighting effects: red to white, red to blue, and red to white to blue, allowing for customizable illumination based on preference and riding environment. 4. Boasting a 500mAh battery capacity, this tail light offers a runtime of 2-5 hours, providing long-lasting and reliable performance for extended rides. 5. Weighing just 31g, this tail light is incredibly lightweight, adding minimal bulk to the bike while still delivering powerful and versatile lighting features. Precautions: 1. As we all know , the different computers display colors differently, the color of the actual item may vary slightly from the following images. 2. If you find it difficult to choose the size, feel free to contact us, we will give you some suggestions, but only for your reference. Shipment includes: bicycle tail light*1 charging cable*1