Due to its lightweight design, the thermometer floats on the surface of the water, which also allows continuous temperature adjustment. The correct water temperature should be 37 and is marked on the scale with a smiley face. The thermometer is completely safe, thanks to the parain, which is inserted in the safety tube. Features: Readable scale No mercury Accurate water measurement It floats on the surface Product dimensions: 10 cm x 23 cm x 1 cm Also try the other products of the BabyOno brand, which are in the Baby Bath, Mother and Baby and Baby Cosmetics and Pharmacy categories. If you are not sure about the choice of this product, be inspired by the category Bath thermometers for children.