Features: Capture every thrilling moment of your ride with the Intelligent Bike Helmets, featuring a high clear 1080p front camera for clearly video recording. With a multichannel airflows cooling system and adjustable head circumference, this helmets offer both comfort and customization to fit size 54-63cm/21.26-24.8in. Suitable for adult cyclists, skateboarders, and outdoor enthusiasts, the helmets builts in camera and safety light features cater to both men and women seeking adventure. Whether you're navigating city streets or exploring trails, the Intelligent Bike Helmets is your perfect companions for cycling, electric biking, and even roller skating. With its integrated front LED light and rear warning taillight, this helmets not only enhances visibility but also ensures you stay safe during night ride or in low light conditions. Specifications: Component:ABS Size:Approx.27x22cm/10.83x7.09inch Fit for 54-63cm/21.26-24.8in Head Circumference; Option Color:White,Black; Camera:1080p; Support up to 128g Memory card(not included) Package Includes: 1pc Cycling Hat 1pc Data Cable 1pc Manual note: Please allow 1mm errors due to manual measurement. Due to the differences between different monitors, the picture may not reflect the actual item color.