Luvion Digital Bath & Room Thermometer is a colourful & fun digital temperature guage that should be added to baby bath water to take away the guess work & "elbow" measurements of relative heat. You baby will be more comfortable in the bath if the water temperature is between 36.5 degrees C & 38.0 degrees C. The elbow test can indicate if the water is too warm but not too cold. The flower thermometer is waterproof & should idealy be added at the filling stage. You should alos ensure the bath water is stirred before measuring temperature. Digital readout Cold when temperature below 33 degrees C Warning alert when temperature is 39 degrees C or above