Controls the audio level for stereo speakers, the RAT can be controlled by either a MIRV1 or any Xantech IR receiver or keypad, 10 position relay controlled auto transformer design, 75 watts/ channel music power, 25 watts/channel RMS, frequency response: 20-20,000 +/- 1 dB, requires RC68, operates on 3 or 4 conductor shielded or unshielded 18 to 22 gauge wire.