Bat box

Last summer, when we arrived at our new home, we found that the garden was frequented by bats of at least two different types in the early evenings.  I bought an electronic bat detector and identifier for Linda as a Christmas gift and she is eagerly awaiting the warmer weather so that we can identify what species we are getting, as some are clearly larger than others.  To encourage the bats further I have now mounted a bat box on one of the trees in our garden.  I wonder if they will show any interest in it?