1. Material: plastic 2. Weight: about 16 grams 3. Size: about 3.5x2x4 cm 4. Battery capacity: 220mAh 5. Charging port: USB 6. Packing list: tail light, silicone strap, buckle, USB charging cable 7. Features: lightweight and portable, USB interface charging, convenient and fast, built-in high-efficiency LED driver and lithium battery management module, waterproof and rainproof, simple and convenient installation, wear-resistant and durable
