Bluetooth Knit Hat Music Cap Hands-free Phone Call Answer Ears-Free Beanie Casual Version (grey) Imported Made from high quality knitted material, the hat is perfect for the cold nights out Compatibility:iPhone, iPod, iPad and All Android Phones. Built-in MIC to allow you to answer calls wirelessly High quality headphones offer immersive sound experience on the go Allows you to listen to the music stored in your device.