This multi-room ceiling speaker system comes with an amplifier, eight ceiling speakers, and all required cables. This home ceiling speaker system is great for listening to music while resting or working, as it provides audio in four different rooms simultaneously. The Power Dynamics NCSS6B ceiling speakers have a 2-way coaxial driver setup with a separate woofer and tweeter in each unit. The coaxial design splits the frequency range of any audio between the separate drivers, resulting in extremely accurate sound reproduction. This ceiling speaker kit's amplifier, the Power Dynamics PV240BT, communicates via Bluetooth to a compatible smart device for wireless music streaming.