These 8 Pyle in-ceiling two-way speakers deliver stereo sound to any room in your home or office without cluttering floor space. Each unit measures 6.5″ diameter and come equipped with a 0.5″ high compliance polymer tweeter for a full, rich sound. Speakers are made of environmentally friendly ABS material and include stain resistant grills. System comes with changeable round and square grill covers and cut-out template for easy and quick installation. They mount flush for a clean look on walls or ceilings. The speaker selector box allows you to play audio to up to four different stereo speaker sets. It easily handles up to 100 watts per channel with speaker systems that have a minimum impedance of 8 ohms. Each input has an on/off switch.