WIRELESS SUBWOOFER ONLY. 6.5" woofer with ported cabinet. 4 channel ID switch (1,2,3,4) Adjustable volume (Level) No Inputs. Unit is part of Boston TVee Model 25. Used with soundbar TVee Model 25. Soundbar transmits signal to woofer! UNTESTED needs working soundbar! Good 8+ condition. Small scratch on top that is 2" long.