List the different Power Classes in Bluetooth.
The following table depicts different Power Classes in Bluetooth:
| Device Power Class | Max Output Power (mW) | Max Output Power (dBm) | Expected Range |
| Class 1 | 100mW | 20dBm | 100m |
| Class 2 | 2.5mW | 4dBm | 10m |
| Class 3 | 1mW | 0dBm | 10cm |