What should I know about FCC compliance for this device?
This device complies with part 15 of the FCC Rules and may not cause harmful interference. It must accept any interference received, including interference that may cause undesired operation. Changes or modifications not expressly approved by Honeywell could void your authority to operate the equipment.
From the official Honeywell TH6220WF2006 Thermostat manual, page 4
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