FCC aprrove standard at 315M and 433M

4 key points:

1. Hand control transmitter time less than or equal 5s

2. Auto control  transmitter time less than or equal 5s

3. From 70M to 900M, Bandwidth less than or equal 0.25% of the base frequency

4. Transmitter power, Basic frequency power less than or equal 80.8dBuV, Second Harmonic power less than or equal 60.8dBuV,

    Third Harmonic power less than or equal 54dBuV