Designer AestheticsMagnetically attached MicroThin trade; speaker grilles ensure a clean virtually invisible appearance that blends with the room's aesthetics. Optional square grilles provide added design flexibility. Superior Sound QualityPrecision tuned and voiced fixed woofer ceiling-mount loudspeakers provide graduated performance for all types of applications. Whether you are listening to background talk radio or a complete orchestra Niles CM series delivers optimal performance and reliability. Installation EaseThree patent-pending spring tensioned mounting clamps permit quick installation and compensate for uneven mounting surfaces and varied environmental conditions. Weather-resistant construction enables installation in moist areas such as bathrooms or outdoors under eaves. Install With ConfidenceThe best-built loudspeakers deserve the best protection-the Niles Lifetime Limited Warranty.