Guess what? IV

EDIT 12.3.2015: I was suggested to join group 'Rätselecke - Puzzle corner - Coin énigmatique'. I did, and now contribute it with this old picture of mine. Please ignore the roman numeral in the title. More of these may become posted at the group in no sequential order.

EDIT 19.3.2015: And this is an anti bark collar, attached around dogs neck. I and when dog starts to bark, it will spray lemon smelling gas, supposedly to give a negative experience to the dog.