The rain guage is equipped with the following functions: - Daily and total rainfall display - Nine-day rainfall history - Rainfall alarm - Indoor temperature display - Maximum and minimum temperatures - Real-time calendar clock - Daily alarm - 300-feet transmission range The RGR122 operates at 433MHz. No wire installation is required. MAIN FEATURES: MAIN UNIT 1 GB GB A. FOUR-LINE DISPLAY - For displaying the total rainfall, current rainfall or rainfall history, indoor temperature and calendar clock B. RAIN RESET / SINCE BUTTON Displays the start day for total rainfall Presses and hold to clear the total and current rainfall Press and hold to reset the date stamp I. [°C/°F] SWITCH - Selects between degree Centigrade (°C) and Fahrenheit (°F) J. [in/mm] SWITCH - Selects between inch and millimeter K. RAIN AL ON / OFF SWITCH - Turns on or off the rainfall alarm L. RESET BUTTON - Returns all settings to their default values M. CLOCK AL ON / OFF SWITCH - Turns on or off the daily alarm N. BATTERY COMPARTMENT - Accommodates two UM-3 or AA-sized batteries O. REMOVABLE TABLE STAND - For securing the main unit on a flat surface C. RAIN SEARCH BUTTON - Enforces a search for the rain guage sensor D. MODE BUTTON - Changes among the clock, calendar and daily alarm in normal mode - Presses and hold to enter the setting mode E. TEMP MEM BUTTON [ ] - Changes among the maximum, minimum and current indoor temperatures in normal mode - Presses and hold to clear the temperature memory in normal mode - Decreases a value in setting mode F. RAIN HIST BUTTON [ ] - Displays the rainfall history in normal mode - Increases a value in setting mode G. RAIN ALARM [ ] BUTTON - Displays the rain alarm setting - Presses and hold to enter the rain alarm setting mode H...