Pro/Tran Q-Series Manual Transfer Switch, Has 10 Circuits With Interchangeable Breakers, Can Run A Large 30A, 240V, Circuit Such As Central Air Or Water Heater, Also Has 15 & 20A Circuits, Up To 5 Circuits Can Be Used For 240V Circuits, Watt Meters Included For Load Management, UL Listed, 5 Year Warranty.