Features: 5.0BT version, knitted material, warm, soft and stylish design. Protects you from cold winter and will also allow you to listen to music and talk while doing variety of other activities. Built-in microphone, available for cell phone to transmit the speaking phone to your audio devices directly, hands-free answering. Built-in Li-ion chargeable battery, charge via USB cable, long stand-by time. Headphone can be taken off so that you can wash the hat. Allows you to keep your music where it belongs - in your ears. You will look great and keep warm while listening to your favorite music. Keep the sound track to your life playing all the time. Perfect for traveling, waiting for the bus, jogging in the cold or just rocking out in your bedroom.