The IR Extender cable enables you to conveniently extend the range of the infra-red(IR) reception of your DVR+ (CM-7500) This means that you no longer have to have your DVR+ (CM-7500) in full view. You can have your DVR+ in a closet or cabinet and only have the end of the IR cable visible. Connect the 3.5mm plug into the IR port on the back of the DVR+(CM-7500). If you experience a short lag in obeying commands from your remote, pull the power for the DVR+ and wait 10 seconds. Plug power back in to the DVR+.