Bluetooth Volume Control - Built in CLASS D Amplifier Wireless Operation<div style="text-align: left;"><strong>[Product Information]</strong><ul><li><span class="a-list-item"> Create a Bluetooth wireless zone for inwall， in-ceiling or bookshelf speakers without complicated wiring. </span></li><li><span class="a-list-item"> Powerful and efficient built-in CLASS D amplifier. 30 Watts per channel nominal. 144 Watts Instantaneous Peak. </span></li><li><span class="a-list-item"> Uses 24 volts for more stable audio and higher power output. (Not included) </span></li><li><span class="a-list-item"> Can replace existing passive volume controls to create separate zone control of remote room. </span></li><li><span class="a-list-item"> Use smart phones， MP3 players and portable devices with minimum Bluetooth 3.0 (up to 4.1) connectivity </span></li></ul></div><img src="http://ecx.images-amazon.com/images/I/41KBrg-Hk4L.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/41AAV9k-K2L.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/41smmY2R%2B4L.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/417US0J3k1L.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/41VvGTWgLgL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/51-r2aHMLiL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/41TMSYTKIZL.jpg" noproxy>