I am about to buy a new lazer line thob off ebay and am wondering how I would reprogramme it. The seller says he will send me the instructions with the thob but from what I've read on the Sigma one I wonder if it's the same....

I've read that you enter the code on the alarm pad, or press the LED but I don't have a pad and the LED doesn't seem to press in

So I wonder, OK maybe you can use the sterio buttons to enter the code: I have a sony explode head unit - will this work?