Aquatrol Zoning Panel, For 4 Zone Pumps or 2 Wire Valves, 32-130 Degree Panel Temperature Rating, R-C Input: 24 Vac, B-B Communication Bus Terminals and Zone Module Thermostat Input: Low Voltage, 2 Wire Polarity Insensitive, Digital Communicating with Power Link to AQ1000 Series Thermostat, Zone Output Contact Rating: 120/250 Vac 5A 1/3 HP, 5-90 % RH Non Condensing Operating Humidity Range