Our knitted Beanie allows you enjoying music while protecting from cold. Built-in microphone let you pick up calls directly and hands free talking. It is available to wash it after taking out cable and device from the cap.Features- Color: Dark grey- Material: Acrylic fibers.- Size: 22 x 21.5 x 2cm.1. version: V4.2- Compatibility: V4.2 version, available for most of devices with function, wireless range up to 10m. Perfect for traveling, waiting for the bus, jogging in the cold or just rocking out in your bedroom.- Built-in Microphone: The microphone in the music unisex hat makes it possible to transmit the speaking phone to your audio devices directly, hands-free answering.- Elastic Knitted Material: Made of thicken Acrylic fibers material, and comfortable. Can protect the forehead and ears, avoid frostbite. Protects you from cold winter and will also allow you to listen to music and talk while doing variety of other activities.- Detachable Washable: device can be taken off from the hat, then you can wash the hat. A perfect winter gift to yourself or friends.