Enjoy enhanced-quality sound outdoors with the Polk Audio Atrium 8 DSI All-Weather Outdoor Speaker. Polk Audio Atrium8 features a single/dual input switch, which allows you to use it either as a virtual stereo speaker or as part of a traditional L/R stereo pair when used with a second speaker. Polk Audio Atrium 8 Outdoor can output up to 125W of continuous audio and is designed to withstand UV rays, salt, fog, extreme temperatures, and heavy rain. Atrium 8 includes mounting bracket and hardware. Polk Audio Atrium all weather outdoor speakers can be mounted either horizontally or vertically. Polk Audio Atrium Series Speakers are All-Weather Certified, and exceed baseline industrial and military specifications for environmental endurance (ASTM D5894-UV Salt Fog, Mil Standard 810 Immersion, Mil-Std 883 Method 1009.8 for salt and corrosion.) These Certification means Polk Atrium speakers can effortlessly withstand the outdoors, and hold up in extreme temperatures and precipitation. Polk Audio Atrium 8 All-Weather Speaker 6.5" Dual Voice Coil Dynamic Balance aerated polypropylene cone, two 1" anodized aluminum dome tweeters and a UNIQUE PATENTED SINGLE/DUAL INPUT SWITCH use as single high-performance speaker or as L/R pair