ADI #:AY-T2440 Model #: T2440 Name: Alpha T2440 Plug-in Transformer, 24VAC-40VA Primary, 120 VAC Secondary, 24 VAC (40 VA) U.L. Listed, For Indoor Use Product Overview Alpha Communications® features a complete line of U.L.® Listed plug-in transformers to power their intercoms, video-intercoms, nurse-call systems, and various signalling .... ELIMINATATE DOORBELL/ THERMOSTATS UNDERPOWER HASSEL: 24V 40VA plug in transformer, replaces and upgrades underpowered transformer with this 24V AC transformer, offering plenty of power for your thermostats and doorbells SPECIFICATION: input voltage: 120 VAC, 60Hz; Output voltage: 24V, 40VA SAFE AND STABLE auto-resettin. "/>24vac 40 va ac transformer plug in