SelecTone Ceiling Mount Amplified Speaker 120VAC - Available in 24VAC/DC and 120VAC. Attractive round ceiling grille. Built-in gain control, adjustable between 64 dBa to 88 dBa at 10 feet (74 dBa to 98 dBa at 1 meter). Appropriate for office environments. Type 1, IP41 enclosure. UL and cUL Listed, CSFM Approved.