These ADVENT CALYPSO speakers are 5.25 inches and 2-way speakers. It is weather resistant for indoor/outdoor use. Great for use as Garden Speakers. It's bass reflex design for high efficiency. Indoor/Outdoor speaker goes anywhere you want music, from pool and patio to kitchen and bath. Its impressive omnidirectional sound adds to the fun of every gathering. Water-resistant design makes it perfect for use poolside and in other moist, damp environments - up to 300 ft.