Always be in the know on the temperature of your pool with the Bestway digital floating pool thermometer. With a large, backlit LCD temperature display, you can quickly and easily read the temperature in either Celsius or Fahrenheit in the sunshine or in the dark. This thermometer includes a built-in, solar-powered battery with a one-touch ON/OFF button. It turns on automatically, lasting throughout the night so you can always get an accurate temperature read of your water. Ranging from 0-50℃ (32-122℉), the thermometer has an IPX7 waterproof rating, making it completely submerge-proof. The floating design and attached string keep the thermometer in place so you can check the temperature before dipping your toes in the water. Made with damage-resistant, shatterproof materials, this thermometer can stay in the pool all season long, come rain or shine!.