WiiM Pro Network Audio Streamer Functionality confirmed. This is a compact receiver that connects to stereo amplifiers and active speakers to play streaming music. It was a product that was briefly talked about for its excellent sound quality. You can stream and play sources like Spotify via AirPlay, and it also supports optical digital input, coaxial digital input, and analog line input, allowing you to connect most playback devices. The exterior has some minor scratches from use. The unit only, no other accessories.