1. Material: ABS 2. Charging time: 60 minutes 3. Use time: 9 hours when flashing 4. Features: memory function, USB charging, no wiring required 5. High-brightness lamp beads, enhance the safety of driving warning, not afraid of rear-end collision 6. USB charging, long battery life 7. Switch button, long press for two seconds to switch on and off, short press to adjust the light mode 8. With vibration mode, in which the light color can be switched at will 9. Charging 5V1A, built-in battery 3.7V 90mAh 10. Wireless installation, nylon adhesive tape or strap fixed
