PRO-WIRE Stereo In Wall Slider Volume Control Imp. matching

PRO-WIRE Stereo In Wall Slider Volume Control Imp. matching : 12-POSITION SMOOTH SLIDE SWITCH TRANSITION BETWEEN . VOLUME STEPS . IMPEDANCE-MATCHING . 12-TAP, . HIGH-GRADE 100W RMS AUTOFORMER . QUICK DISCONNECT TERMINALS . FREQ RESP: 20 HZ–20 KHZ +/- 1 DB . INCLUDES MOUNTING BRACKET & DECORATOR WALL PLATE . LIMITED LIFETIME WARRANTY . WHITE, Ivory or Almond