I had years ago a digital bath thermometer (Tefal Baby), which, no matter how down into the water, swam always so that the temperature was read. This is something I wanted to go back after the battery, which has kept the way 10 years caved. Songs is something apparently impossible to find. I have the Philips SCH550 tested, which tipped over at the slightest movement of water, then the Mebby. This is my wish at the next, because thrown into the water it swims with either upward or downward. Overturning it does not from the design. So this is my desire closest to only the correct direction must put into the water to it just yet. Very good I think the green LED, which is green in the range of 36 to 37.9 ° C, thus indicating that the water is not too hot. The batteries seem to change what I (about 2 years lacked, off after each use) had not yet been. For a fifth star it would have when put into water nor land ;-) correctly.