Primary voltage: 120, 208, 240V. Secondary voltage: 24V. Power Rating：40VA volt amp Product specifications:4.1 x 2.8 x 2.7 inches Test tools:Directly tested with a multimeter is no-load voltage: AC26.6V-27.5V Compatibility: Transformers can be used in industrial, heating and air conditioning controls including air conditioning circuits, relays and gas valves or other applications up to the listed ratings After sales service:if you encounter any problems during the use of the product, please do not hesitate to contact us, and we will give you a satisfactory reply.Customer satisfaction is our tireless pursuit 24V 40VA Control Transformer, Primary 120, 208, 240V Secondary 24V Isolation Transformers, Replacement for 24V Transformer with Foot Mount for HVAC Furnace Multi Tap