Description: Advanced Features: Smart Helmet uses integrated molding technology with a PC shell and EPS interior. It features headlight taillight, left, and right warning turn signals, functionality for answering calls, listen to the music, portable and practicalMaterial & Configuration: The bicycle helmet is made from PC and eps foam material, effectively absorbing impact. Comes equipped with connectivity plus a handlebar controller. Equipped with a removable and washing lining, an adjuster, woven straps for comfortable wearingAdjustable Fit: Our smart cycling helmet is designed to fit both men and women comfortably. It features an adjustable system to ensure a snug and secure fit, regardless of head sizeLighting & Ventilation: The bike helmet is with a 200 lumen headlight that reaches up to 20 meters ahead plus turn light lights on all sides ensure visibility at all times, built in speakers and that provides clear sound even while cycling and the ventilation holes that ensures comfort and breathability during useConnectivity & Convenience: The intelligent bicycle helmet can connect easily with your phone allowing you to listen to music or answer calls while cycling and the LED long range headlight reaches up to 20 meters ahead providing clear visibility even in low light conditions Specification: Material: PC EPS Size Chart: Head Circumference: 57 cm-62 cm/22.44 inch-24.41 inch Package Includes: 1 Smart Helmet Note: Please allow slightly errors due to manual measurement and different monitors.