Please check and confirm if you'd like to use it as a transmitter or receiver, then push the switch button to the right mode(TX or RX) before powering on.
Turn On: Press and hold the MFB button for about 3 seconds until the blue LED is on for 1 second
Turn Off: press and hold the MFB button for about 3 seconds until the red LED is on for 1 second, and then go off.
Please do not change TX or RX mode after powering on Saturn Pro. If you need to change mode, please turn off the device firstly, and then push swith button to the right mode.
If you want to see the more details, please watch video user guide for Saturn Pro-