Automatic Connection: After the battery box of the thermometer and the battery box of the controller are loaded with batteries, the wireless pool thermometer shares data without additional operation. Portable Reader: LCD digital pool thermometer reader makes it easy to read accurate temperature data. Can be held in hand or placed on the platform. Easy Switching Modes: Easily switch C/F modes with the press of a button on the controller. There are also functions to adjust the display position of room temperature and water temperature and adjust the time. Excellent Waterproof Design: Built-in IP67 high grade double seal waterproof cover allows the floating pool thermometer to be safely placed in the water. Multi-Scene Use: With its slim size, it can measure water temperature in swimming pools, hot springs, hot baths, small ponds, aquariums and other places. In the big one there is a rope hole to hold it in place.