HD4 powered (left) speaker Power & volume Power indicator Headphone output HD4 powered (left) speaker rear panel Stereo RCA 7 Bluetooth Inputs & outputs Output to passive speaker Our aright paras of Cams NOR] antenna Bluetooth pair button USB audio input Digital optical ae nou AC power inlet Warranty Information All Audience products have a 3-year Limited Warranty on parts and labor from date of purchase, The Limited Warranty applies only to Audio engine products purchased in the United States.