with internal UltraMatch volume controls and on/off per room. Standard configuration is 8x. Additional installer configurable impedance matching jumpers of 2x or 4x pending application. Zone identifying labels included. These units allow individual volume control and amplifier selection switching between two sources and multiple pairs of speakers. Dual-source operation means two different amplifiers can drive selected speakers simultaneously. Each speaker pair has its own input selector and volume control. Works with all speakers rated 4 ohm or above. POWER HANDLING - 300 watts per channel RMS CONTINUOUS - 150 watts per channel SIZE - 17. 0 inchw x 3. 0 inchh x 6. 25 inchd WT. - 10 lbs. Www. Russound. Com  (less)