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Amazon.com: weideer Input 110V 50/60HZ Output 24V 10VA Power Transformer AC/ AC Single Phase Transformer for Lighting Power Supplies, Audio Equipment etc. Various Small Power Supplies K-030 : Electronics
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24 Volt Transformer, C Wire Adapter Thermostats, Power Supply Compatible with Ecobee, Nest and Honeywell Smart WiFi Thermostat, Ring Video Nest Hello Skybell August Doorbell (Black) - - Amazon.com
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