Main Specifications: Sound System: 3.1 channels (3 front speakers + wireless subwoofer). Output Power (Total): 400W. Sound Technologies: Dolby Atmos, DTS:X, Vertical Surround Engine, S-Force PRO Front Surround. Subwoofer: Powerful wireless, giving you deep and rich sound with frequencies (20Hz - 20,000Hz). Connectivity and Ports: Bluetooth: Version 5.0 (supports SBC and AAC). HDMI: Input port and output port supporting eARC / ARC. Other Ports: Optical audio input and USB input (for updates). [1] Additional Features: Immersive AE Technology: Button to enhance and upgrade normal sound to a surround sound experience up to 7.1.2 channels. Custom Sound Modes: (Voice Mode) to clearly highlight dialogue, and (Night Mode) to adjust sound balance at low levels. Video Compatibility: Supports 4K HDR video pass-through technology, and supports Dolby Vision. Used for two years