I am about to sell (or try to!) our Tomy Digital Walkabout baby monitor on eBay and I can't find the instructions to go with it - I know most of it is self explanatory but inside the parent unit there are 2 little switches, one turns the irritating alarm off for the temp but the other says 'codes' the you can push it either to 1 and 3 or 2 and 4......what on earth are they for?
help!