Smart Bike Helmet，it is a Multi-fonction bike helmet: Bluetooth bone conduction headphones with mic can hands-free phone call,play music; Built-in wind protection goggle.conduction bluetooth headphones conduct sound to the cochlea through heekbones by vibration. Listen to your music or make phone calls and your surroundings simultaneously .

specifications: 

• Material: EPS
• Type: Light Helmet
• Sport: Cycling