.* Allows you to connect 1/4 inch (6.35mm) female socket devices to 1/8" (3.5mm) male extension cable with plug cable or adapter (for example, connect your piano to headphones with 1/8 inch (3.5mm) extension cable).* Connect your smartphones, tablets, or headphones with standard 3.5mm plug to your audio devices, with a 6.35mm stereo connector, making your favorite headphones or other devices compatible with most pro audio and home audio, such as amplifiers, mixing consoles, home theater devices or AV receivers.* Portable size ensures you can carry it anywhere, bags, purses, pockets. Specifications:Connector 1: 6.35mm Stereo PlugConnector 2: 3.5mm Mono JackMaterial: MetalColor: Blue, Red (As Shown)Gold Plated ContactsPackage List:1 x Audio Adapter