This nifty bit of kit can be used in two ways. Slide into the entrance with the word 'closed' showing to use it to completely close the entrance of the beehaus - this may be useful if you are transporting the bees within the beehaus or if your neighbour is having a bbq and you want to keep them out of the way. Or slide in so that the word 'wasp' is shown to act as a wasp guard, restricting the entrance - this will help your bees to defend against a wasp attack. Once slotted in the entrance blocker will hold in place.
The Beehaus comes with two entrance blockers but you may want to invest in a spare.