Hi, sorry for the delay. And thanks for your fast answer. :) I bought it in the shop and then I expect that the nightvision is in the box, where you can add items before you start the next gameround. But this Box was always empty and also when I started the game, there was no nightvision in the game neither. Hope, this will help. Otherwise I could check this out in the next days and provide some screenshot. :)
Okay so normally you should be able to buy e.g. a Nightvision. Then in the Level you should click on one item in the box( max 3) and it should appear in the "bring to level" section. So the box is only to choose from, not the ones you bring in the game. maybe this helps otherwise screenshots would be preferable :