Now you can save big off retail on a wireless speaker that really rocks. Engineered by the audio experts at Acoustic Research, it harnesses 900 MHz wireless transmission technology to send full, rich audio from your receiver to the speaker at distances of up to 150'. Plus, you can listen to music on your smartphone or MP3 player by directly connecting it the AUX jack. Also features bass boost, rugged indoor/outdoor design, magnetically shielded 3" woofer and 2" tweeter, AC and DC power options, 3 selectable broadcast frequencies for optimal reception and more. AC adapter incl. 6 'AA' batteries not incl. 7.3" x 13.8" x 8.3". 90-day limited warranty. Factory serviced to meet original quality standards. May have slight cosmetic blemishes.