The product adopts matte silver metal body, thin and delicate shape, equipped with eye-catching rose red digital display screen, which can directly view the working parameters. The body is equipped with physical control keys to expand the wired audio interface, which can add Bluetooth transmission capability to traditional wired audio equipment such as old-fashioned audio and headphones, thus getting rid of the bondage of wires. The split collocation form is convenient to carry with you, meets the wireless audio switching requirements of multiple scenes such as home listening and commuting, and adapts the basic requirements of enthusiasts for sound quality transmission.