Wireless Smart Speaker with No built-in microphone, for privacy protection Music Synchronized for Multiple Rooms Compatible with Apple Airplay, Amazon Alexa (*), TIDAL Connect, and Spotify Connect Wireless stereo system with 2 units Driver Units: ?19mm silk diaphragm (Treble) + 4inches/102mm (Mid-Bass)
Dimensions: 145.5?145.5?211.3mm multi-room connectivity