Sound Output: 580 W, Dolby Audio 5.1 ch, Number of Speakers 17 Key Features: True 9.1.4 ch Full Surround (Immerse yourself in breathtaking sound) | Wireless Dolby Atmos (Built-in cinematic sound) | Q-Symphony (TV and Soundbar orchestrated in harmony) | SpaceFit Sound Pro (Sound calibrated for your space to perfection) Connectivity Options: 1 HDMI In | 1 HDMI Out | HDMI ARC | HDMI CEC | 1 Optical In | Bluetooth | Wi-Fi | One Remote Control (Use Samsung Smart TV remote to control key Soundbar functions) Additional features: Center Speaker, Up-firing Speaker, Side-firing Speaker, Front Wide-firing Speaker | Wireless Subwoofer Included | Dolby (ATMOS Music,ATMOS,Dolby 5.1ch,Dolby Digital Plus,Dolby True HD) | Voice Enhance Mode | Night Mode | SpaceFit Sound Pro | Active Voice Amplifier Pro | Sound Modes (Surround Sound Expansion, Game Pro, Adaptive Sound, Standard) || Video Feature: 4K Video Pass 60 Hz | HDR 10+