Review on Honeywell AT72D1683 Transformer Multicolored by Michael Zambrano

I bought this unit to power my Ecobee Smart Wifi Thermostat. I only had a 2-wire thermostat, so I bought one of those 24V plug-in transformers first. It worked, but I didn't like the wire hanging off the wall and couldn't perfectly flush mount the thermostat. So I bought this and installed it in a knockout hole in a nearby light switch electrical box using the screw that came with it. I drilled another hole in the drywall to route the thermostat wire from the new transformer to the thermostat and voila you're done! I checked the voltage with a Fluke multimeter and as other reviews say it outputs 27 volts; However, Ecobee was turned on immediately, calibrated and has been working for several days since installation. I was actually concerned about the heat output of this transformer as another brand 18 volt transformer I bought to power the Ring Doorbell got very hot. . I touched the transformer after installing and turning it on, but I didn't feel any heat. Now the hardest part: patching the holes. [sigh]