The IPD-XT850 is UV resistant, scratch resistant, chlorine resistant, and weather resistant with professional-grade components for long-lasting performance and durability. It is designed for full-range background and foreground music as well as paging. The speaker's sealed, in-ground enclosure design delivers true low end response (38Hz, ± 10dB) and optimal off-axis performance. The IPD-XT850 also includes theft resistant mounting hardware. Note: SoundTube IPD speakers are NOT compatible with PoE++. 30W PoE maximum (or 40W maximum with STNet Switch II)