RGR202 Rain Gauge with Outdoor Thermometer & 10-Day Memory Keeps You in Touch with the Weather Need to know how much water your plants are getting? Then this rain gauge is for you. It tells you the total rainfall with date stamp, today s rainfall and daily rainfall history . Plus, it features a high rainfall alert with green LED blinking light. The wireless sensor allows you to monitor outdoor temperature for a full picture of your backyard conditions. Features: Automatic self-emptying rain cup, measures and then eliminates collected rainfall. Wireless transmission range up to 100 feet.