You plug this thingy into your battery charging jack and turn on your reciever.

A couple of LEDs on the reciever will flash rapidly.

You then then turn on the x-mitter while holding in a button on the back of the xmitter. The leds on the reciever stop flashing to indicate that the reciever has learned the new GUID code. This also saves the failsafe settings so make sure your controls are in the position you want them to be in for failsafe before doing this.

It's no big deal really.