[EXTRA SUB-OUT PORT - A Subwoofer output with automatic detection for connecting an external extra active subwoofer. A built-in crossover is activated when the subwoofer is connected. DUAL RCA INPUTS - Easily connect to any devices with RCA to RCA/3.5 mm-RCA audio cable. Connect to two devices at the same time no more plugging and unplugging. (None Bluetooth version) SUPERIOR SOUND QUALITY - 42W continuous undistorted power 4-inch sub-woofer unit and 13mm silk dome tweeter unit ensure strong bass and bring more impactful sound. UPDATED REMOTE CONTROL - Adjust volume mute/unmute from across the room. Bass treble and volume control located on the side panel. Enhance your listing experience with Soundfield Spatializer button. SIDE PANEL CONTROLS - Use the side panel knobs to adjust the EQ to your liking.]