VIZIO SUBWOOFER ONLY for the S3851w-D4 Sound Bar. Only compatible w/above unit - ReplacementCondition:Tested, working, may have samo scraches.Driver Size:6 inSystem Configuration:1 + SubwooferShape:RectangularColor:BlackMPN:S3851W-D4Year Manufactured:2014Material:PlasticBrand:VIZIOType:SubwooferAudio Inputs:Digital Coaxial RCAModel:S3851 W-D4Connectivity:Bluetooth, WiredCountry/Region of Manufacture:ChinaItem Weight:11 lbsSurround Sound Formats:5.1 Channel