When reverse engineering RF related hardware, you may notice an FCC ID number on a placard near the device’s model and serial numbers. The first three letters of the ID represents the “Grantee Code”, and the remaining letters and numbers are the “Product Code”. By entering these two values in the FCC ID Search Form you can usually find some useful information about the product in question.
For more details, check out this brief tutorial from microBuilder.
Via Adafruit.