The Sonos Connect Amp Digital Music Streamer Gen 1 S1 is a gray unit that allows for digital audio coaxial RCA output and features Dolby Digital surround sound formats. This 1st generation Sonos Connect:Amp model supports AAC playable media format and offers Wi-Fi and Ethernet port connectivity. With the ability to play MP3 files and RCA stereo, this digital music streamer is a versatile addition to any home audio setup, providing high-quality sound and convenient streaming capabilities.
eBay