Description: robot kit, raindrops, rain, plant leaf moisture sensor. It can be used for various weather conditions, with direct relay output, control motor starting and closing. Connect the power supply, the power indicator light is on, when there is no water droplet on the sensor board, the relay is closed, the related equipment is activated, the switch indicator light is on, a drop of water is dropped, the relay is disconnected, and the switch indicator light is off. It has performance against oxidation, electrical conductivity, and life. The module is directly equipped with a high power relay to directly control the load. With potentiometer to adjust the sensitivity, control the opening of the relay when different water. Specification: Material: electronic components Raindrop module Size: 5.5x4 cm / 2.16x1.57 inch Relay Module Size: 5x2.6 cm / 1.96x1.02 inch Line length: about. 18 cm / 7.08 inch Module power supply: 12V Quiescent current: 5-12mA Relay load capacity: 250V 10A (AC) 30V 10A (DC) Package Includes: 1 piece raindrop module 1 piece relay module 1 piece line Note: Please allow slightly difference due to manual measurement.