Power handling:50 watts per channel RMS;150 watts peak. Selectable impedance matching for 1, 2, 3/4, or 5/6 speaker pairs. Compatible with 4-Ohm or 8-Ohm speaker systems. Allows switching between two amplified source inputs. Individual room on/off selector switches. 12-step volume control; 42dB maximum attenuation. Isolated inputs for compatibility with all amplifiers. Screw terminal WECO connector included for up to 12-22 gauge wire.