NO GUESS WORK: Aquatix Pro Pool Thermometers Provide Accurate Reading in Both Fahrenheit and Celsius. Maximum Temperature 120F and 50C. PREMIUM BUILD: Heavy Duty Swimming Pool Thermometer, Exceptional Quality, Large Integrated Pocket for Out of Pool Reading, Built from Durable Material & Shatter Resistant. JUMBO SIZE: Clear Large Temperature Reading Display in Fahrenheit and Celsius. Reads Up to 120 Fahrenheit and 50 Celsius. No More Squinting Your Eyes! COMPATIBLE: Ideal as a Pool Water Thermometer, Pool Spa Thermometer, Hot Tubs, Ponds and All Other Types of Swimming Pools. OUR GUARANTEE: Complete 1 Year Warranty. If You Are Not Happy With Your Purchase We Will Issue a 100% Refund – No Questions Asked!