TITANIUM DOME TWEETERS - Listen to clear highs in any kind of music, videos, and films with fully titanium dome tweeters. 8-INCH SUBWOOFER - Receive deep satisfaction from the rumbling lows from the S351DB when the 8-inch subwoofer is activated during playback. BLUETOOTH V5.1 APTX WIRELESS SOUND Other available inputs are AUX, PC, optical, and coaxial. WIRELESS REMOTE CONTROL - Switch among optical, coaxial, AUX, PC, Bluetooth, and control the volume or playback remotely with the included wireless remote. 2-YEAR WARRANTY - For any defects contact us and we will help you with 2-year warranty.