Features: Rockville DCS8T 70V Commercial 8" Drop Ceiling Tile Speaker For Office/Business, Built in 8 highly efficient speaker pre-mounted into a ceiling tile, Easy installation fits perfectly into 2 feet x 2 feet standard-sized US drop ceilings. Simply drop it in and connect the speaker wire, Metal grill, Works for both 70 volt and 100 volt operation or even 8 ohm, Multi-tap options: 10W, 5W, 2.5W, 8 Ohm 30 Watts RMS power handling at 8 ohms, Low profile mounting depth (3.9), Spring loaded speaker terminals, Sensitivity: 91 dB, Designed to sound great for speeches, announcements, music, and chimes, 105° dispersion pattern