Description: Stable signal: With bluetooth-compatible 5.1, this wireless audio receiver features a fast and stable signal transmission speed. Usage: This wireless audio adapter can receive the audio signal that a phone transmits, and transfer it to a connected speaker or for soundbox. Wide compatibility: This wireless audio receiver supports MP3, WAV, FLAC, WAM, APE audio formats. Built-in for decoder: This bluetooth-compatible 5.1 audio receiver allows you to connect to a USB to play music. Adjustable: This wireless audio receiver is designed with knobs that allow you to adjust the volume, bass and treble to meet your different needs. Specification: Material: Aluminum alloy. Color: Black. Bluetooth-compatible version: 5.1. Transmission range: Approx. 20m(No obstacle). Input: optical fiber, coaxial, for AUX, USB, Bluetooth-compatible. Output: R/L for AUX. Power port: Type-c. Size(LxWxH): Approx. 110x25x85mm/4.33x0.98x3.35 inch. Note: There might be a bit of color distortions due to different computer resolutions. There might be a slight error due to different hand measurements. Package Includes: 1 Piece Bluetooth-compatible Audio Adapter(with 1 Piece Coaxial Cable, 1 Piece Optical Fiber Cable, 1 Piece 3.5mm Audio Cable, 1 Piece USB Power Cable).