Picoino Water/Rain/Moisture Sensor Alarm Kit, assembled on breadboard with ATmega48PA mcu, low power, runs on battery for many months/years Works standalone or you can connect it as sensor to an Arduino, Raspberry, etc. Low Power Module, 3V, 0.005mA. Flashes and beeps when water is detected Comes with all parts assembled, Datasheet, Instruction manual, case, battery Circuit, schematic and programming sketch in instruction manual Usable as rain or water sensor. Reliable and sensitive. Moist tissue activates alarm.