M3 Band + Wireless Bluetooth V4.1 Sun Glasses Features Bluetooth Glasses: Black lenses which can filter light and protect your eyesight The wireless set aside to answer and refuse phone calls Flip-up Glasses High-fidelity, CD quality sound effects. Bluetooth version: Bluetooth V4.1 Features M3 Band: Strap material: silicone Case material: plastic Bluetooth distance: 10 meters (open) Battery: Rechargeable Polymer 80mAh...