Back of Transmitter CHANGING DIGITAL CODE CHANNELS [OPTIONAL This product utilizes digital channels fo send a signal from Transmitter fo Receiver. The user can change the signal i outside interference occurs, If you use other wireless products in your home, there is a slight possibility of interference. Use the following instructions to change the current channel sifting to now effing. IMPORTANT! If you change the channel combination on the Transmitter, you must change the combination on the Receiver.