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Amazon.com: PWS-1650 16.5V AC 50VA Class II Power Supply AC Adapter UL 16V Transformer Plug with terminals : Industrial & Scientific
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24VAC 50VA Wall Transformer with PTC Fuse Compatible with All Versions of Doorbell,Nest, Ecobee, Sensi and Honeywell Thermostat,Water Solftener,Screw Terminal Output - - Amazon.com
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