This wireless sound bar features 2.1 channels, a 3D sound processor, a wireless active subwoofer and wireless audio streaming via Bluetooth. It also features wireless sound sync, USB music playback and SIMPLINK connectivity. The LG 300W Sound Bar is designed to fit 42″ HDTVs and can be mounted on the wall for the best sound experience.Length & Power Output: 37.4-inch 300 W (2.1 Channel) – Ideal for 42-inch and larger TVs