Have a look at the freq spectrum sharing chart
here.
As you can see at 315 ~ 434Mhz there are a few bands used, too many to mention but there is an Amateur band at 4.0005Mhz to 400.15Mhz.
Some
garage door openers are on the 315Mhz as well as wireless burglar alarms...I think! Anyway these are coded transmissions.
Anyway at very low power it shouldn't be a problem to anyone else.