Required for Control of 2-Stage Heater Systems Only Brushed Stainless Cover Plate; Factory Wired; Electrical Box Supplied; 24 Vac Capacity [Transformer field supplied] Switch gangs have special “Off, On, On” sequence required for heater operation (Do Not Use a switch with “On, Off, On” sequence) bistroSchwank 2152 Models supremeSchwank 2352 Model 24VAC SWITCH CONTROL PART # Single Switch Gang 1 Zone of 1 To 4 Heaters JM-0201-TS Double Switch Gang 2 Zones: 2 To 8 Heaters JM-0202-TS Triple Switch Gang 3 Zones: 3 To 12 Heaters JM-0203-TS