Bose 251 (R) White (PR. ) Speaker bose(r) 251 speakers set a new standard for performance and reliability outdoors through a combination of advanced technology, extensive research and rigorous testing. An articulated array(r) reproduces sound over a larger listening area. The result is a wide distribution of sound, so you can enjoy music equally from both speakers as you move around outdoors. And the patented multi-chamber bass enclosure helps deliver full, deep bass without audible distortion, from a smaller design. These speakers deliver performance and reliability Most conventional outdoor speakers - and many indoor speakers - simply cannot match. Elegant yet rugged, Bose 251 speakers are engineered to withstand snow, rain, salt and temperature extremes of 140 Degrees F (60 Degrees C) to -22 degrees F (-30 Degrees C). weather-resistant mounting brackets and hardware included allowing for easy installation. Backed by a 5-year transferable . Two 2-1/2-inch twiddle(tm) drivers in an articulated array(r) speaker design and a 5-1/4-inch woofer in a patented multi-chamber bass enclosure for deep bass without audible distortion articulated array(r) speaker design reproduces sound over a larger listening area glass-filled polypropylene cabinet Built to withstand Nature's harsh elements weather-resistant brackets and hardware included for easy installation Compatible with amplifiers and receivers rated from 10 to 200 watts per channel.