Airtronics M11
 

Bind button?
 

manual might help..https://www.manualslib.com/manual/13...onics-M11.html

The receiver is not compatible with the FM module or the 93724 DSSS module. It is compatible with the 93824 FHSS-2 module.
The bind button is located on the module.

I found the DSSS bind instructions from an old product listing on rcmart.

1. Turn the power switch to the ON position on the Transmitter.
The DSSS Module LED will turn on after 6 seconds.
2. Depress and hold the DSSS Receiver Binding button.
3. Turn the power switch to the ON position in the DSSS Receiver and continue holding the Binding button.
The DSSS Receiver LED will flash solely.
4. Release the Binding button on the DSSS Receiver after 2 seconds.
5. Depress and hold the Binding button on the transmitter until the LED on the DSSS Receiver flashes rapidly
6. Binding is now complete. Both DSSS module and Receiver LED will now stay on.
7. Operate on the controls to confirm.