Acoustic Audio CS-I42S-PR 150 Watt 4" 2-Way Home Theater In-Wall/Ceiling Speakers (Pair) Acoustic Audio CS-I42S-PR 4" 2-Way Home Theater In-Wall/Ceiling Speakers (Pair) Recommended Power: 20-150 Watts For Each Speaker 4" Polypropylene Cone Woofer with Butyl Rubber Surround and Piezo Tweeter 2-Way 12dB per Octave Passive Crossover for Greater Fidelity Integrated Wall-Lock Mounting System and Cut-Out Templates Included For Easy Installation