RE: Why don't all radios have this feature? Add on if you have one.
1) All transmitters should have flight timers or power on timers that beep after a preset time.
2) All receivers should have a method to check signal strength to make range checking more precise.
3) All transmitters should have a low voltage alarm.
4) It would be nice if all transmitter antennas had the ability to be tilted up to a 45 degree angle.