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16.5V 40VA Doorbell Transformer and Thermostat Compatible with Ring Nest Sensi Ecobee Honeywell Plug in Thermostat and All Versions of Ring Doorbell Transformer

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Free shipping on orders over $29.99

$17.99

$ 8 .99 $8.99

In Stock

About this item

  • Compatibility: 16.5V doorbell transformer is compatible with Honeywell Ademco, DSC, ETC burglar alarm systems, as well as Ring video doorbell, Ring video doorbell 2, ring video doorbell pro, Nest Skybell doorbell and other devices that require constant 16.5 volt power for operation, and for residential, commercial and industrial use.
  • Product Specification: Input 120V AC, 60HZ; Output: 16.5V 40VA. Auto resetting, with LED green power indicator, positive/ negative/ screw terminals & Auto-Resetting Fuse.
  • Guaranteed Quality: Plug in Thermostat and Doorbell Transformer UL certified, PTC design for circuit protection, avoid damage the components in the circuit.
  • Eliminatate Doorbell/Thermostat Under Power Hassel: 16.5Volt plug in transformer adapter can continuously provide power to your doorbell or thermostat to improve the situation of low battery or power voltage deficit.
  • Easy to Install: The doorbell transformer is easy to replace and install with screws, unscrews or threaded clips to the electrical box, and output with screwing the cable on the terminals, you can arrange your cables freely according to the length you need, to make the wires neat. Notice: only equip with plug in transformer, no extra wires included.


Plug in Doorbell Transformer 16-24 vac for Smart Thermostat:
Product Specifications:
Input Voltage: 120V 60Hz
Output Voltage: 16.5V 40VA
Safety and stable:
Passed UL certification, PTC design for circuit protection, avoid damage the components in the circuit. Stable power supply with overload protection/overvoltage protection/overheat protection,quality and safety are guaranteed.
Easy to install:
First: Connect the 2 coils to the power adapter.
Second: Tighten the screws.
Third: Use a screwdriver to install the retaining coil for doorbell.
Fourth: After installing the 2 coils,tighten the screws and close the back cover.
Fifth: Plug in the power adapter, the LED green power indicator will light up.
Last: When it fully charged, press the doorbell can be used normally.
Notice: only equip with plug in transformer, no extra wires included.
After-sales service:
If any of our 16.5volt ring doorbell transformers fail to meet your expectations, please contact us and we will try to solve the problem.


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