and the colorful light battery. [Digital Pool Thermometer Floating]- The digital pool thermometer has a high- temperature sensor to accurate temperature readings. It is a convenient way to monitor the temperature of bath water and outdoor swimming pools. [High Quality Material]- The swimming pool thermometer is made of high quality material, , , , suitable for indoor and outdoor use. This product is equipped with a dual power supply system. Solar separately powers the thermometer's polymer battery [Occasion]- Floating thermometer is your to enhance the fun of swimming. Perfect for home pools, spas, pool spas, , aquariums and fish ponds.