Here's a list from a searchable FCC database of unlicensed intentional radiators that are completely legal and transmit within the 70cm ham band at 433.92MHz.
Everything from remote tire pressure sensors to doorbells, weather stations, gate openers, wireless light switches, driveway alert systems, LITERALLY everything under the sun operate completely legally and unlicensed there. No ham radio license is required, even though I have one of those too.
"Operation of unlicensed Part 15 Devices is permitted between 420 and 450 MHz."
https://fccid.io/frequency-explorer.php?...per=433.92
Everything from remote tire pressure sensors to doorbells, weather stations, gate openers, wireless light switches, driveway alert systems, LITERALLY everything under the sun operate completely legally and unlicensed there. No ham radio license is required, even though I have one of those too.
"Operation of unlicensed Part 15 Devices is permitted between 420 and 450 MHz."
https://fccid.io/frequency-explorer.php?...per=433.92