Eurocom ST2400NANO Ceiling-mount “blind fit” loudspeaker assembly designed for high-quality music, paging and AV playback Exceptional sound quality with wide frequency bandwidth and uniform dispersion 20-Watt, 4" low-frequency driver mounted in a ported reflex enclosure provides exceptional bass response Coaxially-mounted 0.5" high-frequency transducer with waveguide delivers ultra-wide 150° nominal dispersion User switchable high-pass filter enables deployment with subwoofers Professional 4-pole Euroblock connector Ultra-compact 4” depth zinc-coated steel back-can with seismic restraint tab Loudspeakers packed in pairs with Split “C” ring and steel tile bridge support channels Detachable white powder-coated steel grille compliments any decor (optional black grill available) UL1480 and UL2043 rated and compliant with all applicable safety codes Designed and engineered in Germany