The JBL Control 24CT Micro compact in-ceiling speaker is perfect for background music and music-plus-paging systems. From the Manufacturer: The Control 24CT Micro is a compact in-ceiling speaker, providing full, high quality sound for background music and music-plus-paging systems. Features: Extremely wide 150° coverage. Smooth frequency response. Includes 9 W multitap transformer for Shallow 4 in (100 mm) depth. Packaged with grille, backcan and tile rails for fast Specifications: Frequency Range: 85 Hz - 25 kHz Power Rating: See transformer taps Transformer Taps: 9W, 4W, 2W, 1W (& 0.5 W taps @ 70V) Crossover Frequency: 3.5 kHz Maximum SPL (1m): 94 dB (top 70V/100V tap) Sensitivity: 86 dB (100 Hz - 10 kHz) Coverage Angle: 150° conical Input Connectors: Screw-down terminals. Drivers: LF Driver: 115 mm (4.5 in) HF Driver: 12 mm (0.5 in) Color: White Safety Agency: Suitable for use in air handling spaces per UL1480, UL2043, NFPA90 & NFPA 70. S7232/UL Listed, Signaling Speaker. Transformer UL registered per UL1876. In accordance with IEC60849/EN60849. Backcan: formed steel (included "blind-mount") Baffle/Rim: Medium impact polystyrene, fire rated UL94V-O Ceiling Cutout Size: 167 mm (6.6 in) diameter (cardboard cutout template included) Included Accessories: C-shaped support backing plate 2 tile support rails (fits both 2 ft and 600 mm tiles) Cutout template, cardboard Optional Accessories: MTC-24TR trim ring for retrofit installations MTC-24NC optional new construction bracket, flat MTC-24MR optional mud ring construction bracket Plenum Usage: Yes, backcan included