Practical: This pool thermometer conveniently records maximum and minimum indoor and water temperatures. Reasonable design: Suitable for both indoor and outdoor use, it is safe to use thanks to its waterproof and floating properties. Versatile: This thermometer can be used in bathrooms, spas, swimming pools, and other pools to measure water temperature. Water temperature range: -40 ~ 60 degrees Celsius. User-friendly: Easy-to-read LCD display with Fahrenheit and Celsius. 1. Calendar: January 1, 2000 to January 31, 2099. 2. Alarm with snooze function. 3. Water temperature range: -40 to 60 degrees Celsius. 4. Indoor temperature range: 0 to 50 degrees Celsius. 5. 433MHz radio receiver. 6. 3-way water temperature measurement. 7. Records the highest and lowest indoor and water temperatures. 8. Wireless transmission line with clear sight. (Outdoor): 100 feet, ideal conditions: 300 feet. Frequency: 433 MHz. Update frequency: 90 seconds for the remote control, 10 seconds for the console. Measurement standard. The following table contains information on measurement parameters. Measurement range Accuracy Resolution Ambient temperature -40 to 140°F ± 2°F 0.1°F Water temperature -58 to 140°F ± 2°F 0.1°F Power consumption Display panel: 2 x AAA 1.5V alkaline batteries Remote control sensor: 2 x AA 1.5V alkaline batteries Battery life: At least 12 months (with lithium battery, at least 12 months in cold water, air conditioning, base station, thermometer, sensor, remote control)