The Pool Thermograph is a wireless floating device that provides easy-to-read temperature readings for swimming pools, bath water, and hot tubs. With its high-precision temperature sensor, it ensures accurate measurements in both Celsius and Fahrenheit. The indoor host temperature detection range is -9.9C to +50C (14.2F to 122F), while the pool sensor temperature detection range is -40C to +70C (-40F to 158F). Made from durable and environmentally friendly ABS material, the Pool Thermograph is suitable for both indoor and outdoor use. Its solar-powered design ensures a long lifespan and eliminates the need for batteries. Simply place the floating device in the water and wait for 1-2 minutes to read the temperature. Enhance your swimming experience with the Pool Thermograph. It is perfect for family swimming pools, spas, hot tubs, aquariums, and fish pools. Please ensure that the Thermograph cover is tightened before placing it in the water to prevent water from entering. If you notice any water mist on the screen, simply unscrew the lid, dry it, and then continue using it. The package includes one monitor and one sensor, making it easy to set up and use. Monitor your pool or bath water temperature with ease using the Pool Thermograph. Key Features: Wireless floating device for easy temperature readings High-precision temperature sensor for accurate measurements Indoor host temperature detection range: -9.9C to +50C (14.2F to 122F) Pool sensor temperature detection range: -40C to +70C (-40F to 158F) Durable and environmentally friendly ABS material Solar-powered design for a long lifespan Suitable for indoor and outdoor use Ideal for family swimming pools, spas, hot tubs, aquariums, and fish pools