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24V 40VA Thermostat and Doorbell Transformer, Power Supply Compatible with Nest, Ecobee, Sensi and Honeywell Thermostat, Nest Hello Doorbell and All Versions of Ring Doorbell (Style 1) - - Amazon.com
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Amazon.com: Toroidal Transformer, Power, 300 VA, 2 x 15V, 20 A, Panel, 1182 Series : Industrial & Scientific
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Control Transformer, 750VA, 4.50 in. H: Electronic Transformers: Amazon.com: Industrial & Scientific
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Dayton Control Transformer, 75VA VA Rating, 277VAC Input Voltage, 120VAC Output Voltage 4MTN7-1 Each: Amazon.com: Industrial & Scientific
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