The Vizio SB3821 (commonly SB3821-C6 or SB3821-D6) is a popular 38-inch 2.1 channel soundbar system featuring a wireless 5.25-inch subwoofer. It delivers up to 100 dB of room-filling sound, built-in Bluetooth for wireless music streaming, and Dolby Digital/DTS audio decoding for an enhanced home theater setup.Key Specifications & FeaturesChannel Configuration: 2.1 system (left/right stereo bars + wireless subwoofer)Soundbar Dimensions: 38" W x 3" H x 3" D (Weight: ~5.8 lbs)Subwoofer Dimensions: ~8.3" x 9.1" x 8.3" (Wireless range up to 60 feet)Audio Tech: Dolby Digital, DTS TruSurround, DTS TruVolume, DTS StudioSoundInputs: Optical digital, coaxial, RCA, 3.5mm AUX, USB (for .WAV audio/updates), and Bluetooth