4" polypropylene woofer with rubber surround 1" polypropylene midrange .75" piezo tweeter Includes removable mounting brackets 4ohm -6ohm impedance 50W RMS 200W peak power Nonremovable grilles Rotating logo for versatile mounting options Two 1/4"-20 insert mounts on rear of each speaker UV-treated ABS enclosure Brackets compatible for walls or ceilings constructed of solid wood, brickwork, concrete, hollow buildings block or wood studs Pair