Set of 4 I purchased these for my store, but unfortunately, I no longer need them, so I'm selling them. I opened one for inspection, but they haven't been used. Thank you! (*^^*) Features a 1.5-inch full-range unit and a wide 170-degree dispersion speaker, allowing for installation on walls or ceilings. - Brand: Yamaha - Color: White - Speaker Size: 1.5 inches (3.75cm) - Directivity: 170 degrees - Enclosure: Black 2-engine - Mounting: Wall and ceiling mountable - Adapter: Compatible with Ceiling Mount Adapter-C MA1MB/CMA1MW Thank you for looking! ＼(^-^)／