Ideal-Air™ Pro-Dual™ 18,000 BTU Multi-Zone Heating & Cooling Ceiling Mount Cassette with grill. The Ideal-Air™ Pro-Dual™ Indoor Head unit can me matched up with multiple different configuration with 1 single outdoor condensing unit. (See Match up chart online at www.ideal-air.com, this will also be listed on the packaging of the box). 208-230V, 60Hz, 1ph, 3 speed fan, 41 dB sound rating, 15 Amps and 46 watts. Line set connection 1/4 x 1/2 inch.