Theater Solutions 4R4G New Wired Outdoor Garden Waterproof Granite Rock Patio Speakers (set of 4) Theater Solutions R4G indoor or outdoor weather resistant granite grey speakers, recommended power is 10-125 watts per speaker, efficiency is 94dB, frequency response is 80Hz-20 kHz 2-way design and functionality, 8ohm, deluxe 4.5" poly mica woofers with sealed voice coils, butyl rubber surrounds, ferro fluid cooled soft dome tweeters, silicone encased 4" wire leads Silicone multi-layer composite cabinets, rust resistant grills, 20 degree angled drivers, (HxWxD) 8"7.5"6.75", instructions included Use for back yard decor and entertainment, sunrooms, atriums, patios, decks, garden, pool, spa, business / office outdoor dcor These wired rock speakers require a receiver or amplifier to power them, this listing and price is for 2 pair / 4 outdoor rock speakers