So the Ambient Weather F007TH is a fairly inexpensive 433.92Mhz based temperature + humidity sensor system. If you pick these up they tend to come with a base station to show the information, and between 1 and 3 sensors. The neat thing about these is that the channel can be changed, it's just a binary number that's toggled by 3 jumpers: J19, J18, J17.
| Channel | J19 | J18 | J17 |
| 1 | | | |
| 2 | X | | |
| 3 | | X | |
| 4 | X | X | |
| 5 | | | X |
| 6 | X | | X |
| 7 | | X | X |
| 8 | X | X | X |
That's it, just clear / close the solder jumpers as needed to switch them if your version doesn't already have a toggle to change it