I have one of these.
I gaffer taped the excess cord to the skirting board, but will get the kit they mention.
Only recently I realised I could use the monitor without the sensor pad. I didn't need that function and it kept alarming even with a thin mdf board under it.
Works like a normal monitor now. I find the instruction manual so complicated. It didn't say it can be used without the sensor pad, but you can unplug the wire from the nursery unit where it says sensor pad, and it works like a normal monitor.
silverton I have done the same several times. You need to " re pair " the units so they find each other.
Turn the parent unit on, and the nursery unit. Press the clear knob under the angels halo on the front of the unit, let it beep. And it should be fine. The parent unit will clear to normal screen in a few seconds.