Theater Solutions 4R8S Outdoor Sandstone 8" Rock 4 Speaker Set for Deck Pool Spa Yard Garden Theater Solutions R8G indoor or outdoor weather resistant sandstone speakers, recommended power is 10-250 watts per speaker, efficiency is 97dB, frequency response is 50Hz-20 kHz 2-way design and functionality, 8ohm, deluxe 8" poly mica woofers with sealed voice coils, butyl rubber surrounds, ferro fluid cooled soft dome tweeters, silicone encased 6" wire leads Silicone multi-layer composite cabinets, rust resistant grills, 20 degree angled drivers, (HxWxD) 13.5"12"12", instructions included, these speakers require a receiver or amplifier to power them Use for back yard decor and entertainment, sunrooms, atriums, patios, decks, garden, pool, spa, business / office outdoor dcor This listing and price is for 2 pair / 4 outdoor rock speakers