Nice Apollo Inti 2-Channel Mini Transmitter INTI2/A (Yellow)

with their new line of transmitters and plug-in receivers you now have an option to program a new transmitter using an existing one here's how in this example the green transmitter on the right is our existing transmitter and the black one on the left is our new transmitter first place the transmitters together top to top next press any button on the new transmitter until the existing transmitter starts to blink finally press the button on the existing transmitter onto the light on the new transmitter lights up in now both transmitters are available to work your game please note should you make a mistake you must press each transmitter ten times in order to start over you