The Acesori A.Buds Bluetooth Earbuds are made of a fully aluminum housing in a very compact and form fitting design. The A.Buds are completely wireless featuring the newest Bluetooth 4.1 technology. The earbuds are uniquely magnetic, meaning they attract to one another allowing for easy around-the-neck portability. Each earbud is made of premium aluminum materials with a sleek metallic finish. The braided cord adds further durability and excels the elegant design. They include color matching in-line controls with a built-in microphone.