This Honeywell NEMA Standard Transformer is a multi-mounting. 24-Volt control circuit step-down transformer designed to power any 24-Volt control system, including thermostats, gas valves and relays. 1 year limited warranty. Override protection providedColor-coded 9 inch lead wires for primary connectionsEnergy limiting, meets NEMA standard DC20-1992Transformer is marked NEMA type D, meets NEC class 2 not wet, class 3 web UL 1585 requirementsConnections 2 screw terminals can be foot mounted, plate mounted or clamp mountedVoltage: 120 (50/60 Hz)