According to reddit user, /u/foreverska, FCC ID PL3-100B “Pebble Smart Doggie Doorbell” operates on a frequency of 315 MHz rather than the FCC ID authorized 433.92 MHz.
The schematics indicate CS5211DGO as the transmission chip, as well as the Circuit Description confirming 433.92 MHz operation.
Assuming the device /u/foreverska tested is genuine, it’s likely Pebble Smart altered their designs after FCC ID certification to use 315 MHz for power, cost, or range improvements. This magnitude of a change would require re-certification of the device with the FCC.
Month: March 2019
FCC ID M3M-40821302
We have a report that FCC ID M3M-40821302 is a typo of the proper FCC ID M3N-40821302. Some remote key-fob devices with the FCC ID M3M-40821302 printed on them may actually be authorized under M3N-40821302.