I’m going to say they have been used but they haven’t . i’ve got them from my parents garage as you can see in the pictures I have taken out the boxes and to see if they all work they all work apart from two faded screens doesn’t affect them from working you can see in the screenshot I’ve taken on the app they show the radiator valves are in the app and I’ll take a picture of the receiver to show it works plugged in if you have any questions please contact don’t know if battery work in boxes did not try 
eBay