Yundianwei Smart Bluetooth Helmet with Built-in Sensor Light, 3C Certified Electric Motorcycle Summer Safety Helmet for Men and Women, Extra Large Size, Universal Four-Season Half Helmet for Electric

Smart light sensing system with automatic high-brightness light switching and dark environment wake-up for enhanced safety

Built-in Bluetooth 5.2 chip with integrated stereo microphones for hands-free calls, music playback, and navigation voice commands

Bluetooth functions include 10-15 hours continuous use, 48 hours standby, and 3-second rapid connection

Half-wrap detachable hard impact-resistant ear protectors for enhanced safety and comfort

Large sunroof with 32-hole ventilation system, sliding open/close design for adjustable airflow and breathability

Adjustable head circumference with easy-to-use dial knob (sizes S to 5XL covering 53cm to 70cm head circumference)

ABS high-impact resistant outer shell combined with high-density EPS cushioning layer for multi-layer protection

Extended windproof visor with quick-release base, flexible and shatter-resistant lens, detachable for easy cleaning and replacement

IPX4 water resistance rating for protection against splashing water

Multi-level adjustable buckle with skin-friendly chin pad for secure and comfortable fit