La Crosse It Wireless Rain Gauge - $9.88

You'll always know how much rain has fallen and you won't have to go out in a downpour to keep track. Instant Transmission is the latest wireless transmitting technology exclusively developed and designed by La Crosse Technology. It completely updates and transmits outdoor weather readings every six seconds so that you can monitor meteorological changes as they happen. The self-emptying rain collector can be mounted up to 330 ft. away from the receiver in your home. You can set an alarm to inform you when a certain amount has fallen between 0" and 4" in a 24-hour period. A rainfall indicator lets you know how fast it's coming down from a light shower to a major rain event with display icons. Receiver uses two AAA alkaline batteries (not included). Remote rain sensor uses two AAA alkaline batteries (not included). Receiver dimensions: 3.85"H x 2.45"W x .95"D. - $9.88