Jeystar Wireless Digital Swimming Water Temperature Spa Floating Floating Pool and Spa Thermometer The wireless pool and spa thermometer is a device to measuring indoor and remote outdoor temperature in Swimming Pool, Pond and SpaThe wireless pool thermometer transmitter is water proof and floats on the surface of the water. The Water thermometer has wide measuring range from -40 to +60 Indoor temperature range: -10 to +50 The sensor displays and wirelessly transmits the water temperature to the display console.The console also includes an indoor thermometer for monitoring air temperature. It can receive three channels with 433MHz/100m distance, and receive water temperature from up to 3 locations. The pool thermometer can set temperature alarm,alarm with snooze.display indoor and water temperature,month,date,week,time and reception channel.