1. Safety upgrade, additional warning taillights 2. The rear of the helmet is equipped with a detachable USB rechargeable tail light, which has high brightness and 9 warning modes, which is more comprehensive at night. 3. 10-hole design, fast heat dissipation 4. Lightweight and comfortable, not tired for a long time 5. Removable and washable inner lining, hook and loop fastener design, convenient and quick to disassemble 6. Adjustable head circumference 7. Material: EPS+PC 8. Power supply mode: USB charging 9. Taillight battery capacity: 180mah 10. Size: free size (head circumference 57-60mm) 11. Weight: about 245g
