Binding Procedure:
Binding is the process of uniquely associating a receiver to a transmitter/transmitter RF module . A transmitter internal or external RF module can be bound to multiple receivers (not to be used simultaneously). A receiver can only be bound to one RF module. Follow the steps below to finish the binding procedure.

1. Put the transmitter/transmitter RF module into binding mode
2. Power on the receiver, the receiver's green light will flash and the receiver is in binding mode. Bind in the radio, the receiver's green light will be always on, then the binding is completed. If the receiver is not bound in 20 seconds after power-on, the receiver will get into Wifi firmware updating mode, the green light will flash at the same time.

Fail-safe:
Fail-safe is a useful feature which is for a preset channel output position whenever control signal is lost for a period.

Follow the steps to set Fail-safe for channels necessary:

Fail-safe for receiver supporting ELRS RF mode setting can be set via radio interface, which support no pulse, hold and custom three modes for each channel.radio go to: MODEL SETUP/Internal RF/Fail-safe.