13. Alt RC Code (on/off): To turn on or off the DVD player’s response to a set of alternative remote control code. The alternative remote control code enables users to program their universal remote controls that comes with TV, Projector or A/V Receiver to operate the DVD player. If the universal remote control has a DVD player control function, please program it with the code for TOSHIBA, PHILIPS, MAGNAVOX, MARANTZ or ZENITH DVD players. Since each brand of remote control may have several sets of codes, you may need to try several times using different codes to get the working one. In case you do not want the DVD player to respond to the alternative remote control code, you may turn off this option.