ARDUINO UNO R3 A000066 OPEN SOURCE ELECTRONICS PROTYOTYPING PLATFORM
Disc. 115vac Relay Board
WATER ALARM KIT
Gives alarm sound when water is detected. Incorporated alarm buzzer. Water sensor can be placed at a distance by cutting the board and using wires to connect the sensor.
Specifications
power supply: 9V battery (not incl.)
dimensions: 1.8 x 2.8"