The item we got differed ( the display ) from what was shown on amazon website. After putting in to the bath it worked although you had to look really hard to be able to see the changing colours on the display - hardly visible. The ideal temperature of water in which we bathed our daughter ( which she liked and enjoyed ) was indicated as too hot, and when after bath the water cooled it showed the temp is "ideal". Had we followed this device advice we would have our baby angry.... Once again I made a mistake of trying to save money by bying something cheap. I should have already know better.... Not recommended