The Taylor 2755 Wireless Rain Gauge with Thermometer Measures and displays hourly, daily, weekly and monthly rainfall up to 99.98 inches. Self-emptying rain cup has a remote sensor that collects rain and transmits a signal back to the base unit reporting the rainfall amount. Use to monitor outdoor temperatures as well as plant, lawn and garden irrigation and conserve water by avoiding overwatering. Indoor temperature range 32-122 Farenheit (0 to 50 Celsius.) Outdoor temperature range -4-140 Farenheit (-20 to 60 Celsius.) Outdoor temperature range may be expanded to -4 - 158 Farenheit (-20 - 70 Celsius) with use of lithium batteries. Minimum and maximum temperature memory recall. Minimum and maximum rainfall memory recall with automatic or manual daily reset. Temperature trend arrows indicate rising, falling or steady temperature readings. Rain history bar chart display. Auto scroll option automatically toggles between indoor and outdoor temperatures. Programmable temperature alert audibly indicates if current temperature readings have reached a chosen upper or lower limit. 12/24 hour clock and calendar. Base unit measures approximately 4.75 inches high x 3.75 inches wide with a 2.75 high x 2 wide oval LCD screen. Rain cup measures approximately 4.5 inches high x 6.5 inches wide x 3.5 inches deep. Base unit can be displayed on a table top or mounted to a wall with screw or nail (not included. Rain cup can be mounted to a solid surface or into the ground with spikes and screws (included). Up to 100 foot transmission range. Low battery indicators for base station and rain cup. 2 AA batteries for base station and 2 AA batteries for rain cup not included.