Features: Wirelessly receives rain data from remote rain gauge Stores history of rainfall Accumulated rainfall until manual reset Rainfall display for last rain period, past 1 hour and past 24 hours Bar graph of historical rainfall View last seven days, weeks, or months on graph Scroll through period by period on graph Rainfall alarm function Rainfall transmitter self-empties via tipping bucket Measures 1/100th of an inch per tip Display is wall or desk mountable Manual set time and date 12 or 24 hour time and date display Specifications: Total rainfall range: 0.01 to 999.99" Rainfall accuracy: ±0.02" (±3%) Transmission frequency: 433.92 MHz Transmission range: up to 80 feet open air Sampling rate: every 5 minutes Display dimensions: 4.25" x 3.5" x 0.75" Sensor dimensions: 7.2" x 5.9" Power source: main unit- 2 "AAA"; sensor- 2 "AA" Supplied With: Main display unit Wireless rain collection bucket Batteries NOT included