The Google Chromecast Audio – Black transforms your existing speakers into a smart wireless audio system. Simply plug it into your speaker’s AUX input, connect to Wi-Fi, and stream music, podcasts, and playlists directly from your smartphone, tablet, or computer. With multi-room sync, you can group multiple Chromecast Audio devices for whole-home sound. Compact and easy to use, it’s the perfect way to upgrade your audio experience without replacing your speakers.• Wireless Music Streaming – Stream audio directly from Android, iOS, or Chrome devices over Wi-Fi. • Compact & Portable – Small, lightweight design makes it easy to use with different speaker systems. • Easy Setup – Plug into any AUX/3.5mm input speaker and connect via Wi-Fi in minutes. • High-Quality Sound – Supports lossless, crystal-clear audio playback for premium listening. • Multi-Room Capability – Sync multiple Chromecast Audio devices for seamless whole-home sound.