Pool Thermometers Provide Accurate Reading in Celsius.,Maximum Temperature 40C.It has excellent comprehensive physical and mechanical properties. No electricity, no liquid, through the bimetallic, thermal expansion and contraction, the pointer shows the temperature. Perfect as a Pool Water Thermometer, Pool Spa Thermometer, Hot Tubs, All Other Types of Swimming Pools.A pool maintenance essential.You can use it for a long time. This is not a toy, keep away from children.No more guesswork with accurate temperature readings. This pool spa thermometer use for checking water temperature readings in pool, spa, , bath tubs or pet baths. Name: Swimming Pool Thermometer Weight: about 210g Application: swimming pool Material:Metal + plastic colour:blue Package Contents: 1 x Swimming Pool Thermometer Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.