• The helmet is designed with front light and tail light, safer to cycle at night
• It has four lighting modes: front lights and rear lights are always on; front lights are always on, rear lights flash quickly; front lights are always on, rear lights strobe; front lights are off, rear lights flash quickly
• Built-in 750mAh rechargeable lithium battery, long battery life
• PC shell + EPS foam one-piece structure, double protection, safer and more secure
• With vent holes for ventilation and keep the head cool and dry
• Lightweight and breathable, comfortable to wear

Specification:

• Material: PC shell + EPS black liner 
• Battery: 750mAh
• Charging time: 2 hours full charge
• Standby time: 160 days
• Battery life: 6 hours (maximum power consumption mode)
• Head circumference: S size: 48-53cm, M size: 54-57cm, L size: 58-61cm