Amazon.com: Step Down Voltage Convertor, Power Transformer AC 220V Input Voltage to 12V/24V Output Voltage(24V) : Electronics
New SQUARE D 9070T150D2 150VA 240/480V-AC 24V-AC Transformer D324414: Amazon.com: Industrial & Scientific
Maxdot 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 (1 Pcs) - - Amazon.com
24 Volt Transformer, C Wire Adapter for Nest Honeywell Ecobee and Sensi Thermostat, Doorbell Transformer Compatible with Wyze Video Doorbell - - Amazon.com
HQRP Control Transformer 40VA, Primary 120, 208, 240V Secondary 24V, HVAC Furnace Multi Tap Power Supply Adapter C(UR) US Certified
Goodman 0130M00138S 240V to 24V Transformer - - Amazon.com
YWBL-WH AC to AC Single Power Transformer Isolation Power Transformer Transformer 50Hz 2W 220V Input 12V/24V Output
STANCOR P-8575 Voltage Transformer 24V-CT 115/230V-AC: Amazon.com: Industrial & Scientific
24 Volt Transformer, C Wire Adapter Thermostat, Competible with All Versions of Ring Doorbell and Thermostat for Nest Ecobee, Sensi and Honeywell, 315" Long Cable 24V Transformer - - Amazon.com