I was struggling to get these locally, but having found these I am delighted. The price is very good, they arrived fast and the packing was very good, with all light tubes being packed inside a robust cardboard tube.
This unit does exactly what it says. You can scan it over areas to get a temperature profile and detect hot or cold spots. Used in a house it can show up some surprises. Excellent value for money as battery is included, delivery was fast.