Can ELRS from different manufacturers be used in common?

ELRS RX and TX from different manufacturers can be used together, but different degrees of Oscillator (XO) Frequency Error may occur. Therefore We recommend using ELRS TX and Rx from the same manufacturer. Please check: https://www.expresslrs. org/hardware/crystal-frequency-error/

——iFlight Support Team

What is the startup and shutdown process of GPS rescue mode?

1. Turn on the GPS rescue mode through the remote control. After the drone flies back, flip the switch to turn off the mode.

2. If the drone has automatically triggered the GPS rescue and you want to take over manually after flying back, you need to toggle any joystick on the left or right to take over, instead of flipping the GPS rescue switch.