This self-watering DIY kit is easy to use and perfect for monitoring soil moisture very effectively as it automatically waters your plants and flowers. Automatic watering system combines pump, tubing, soil moisture sensor and 4-channel 5V relay module into a plant watering system, including kit for the entire DIY drip irrigation system. A capacitive sensor that you place in the soil around the plant, and via another sensor and a motherboard you can communicate with the plant. Do your plants need to be hydrated to see if they are dehydrated? Always by your plants, the system can automatically water your plants. When your soil becomes too dry, the pump starts and water flows into the pipes and pot. You don't have to worry about your plants when you go on vacation Capacitive soil moisture sensor: Working voltage: 3.3~5.5 VDC Output voltage: 0~3.0 VDC Interface: PH2.54-3P Size: 98 x 2 m (LxW) Pins: Analog signal output, GND, VCC 1-channel 5 V relay module: VCC: Connect to 5 V positive power supply GND: Connect to 5 V negative power supply Mini water pump: : 3-5 V Output diameter: 0.29 inch/7.5 mm Output inner diameter: 0.17 inch/4.5 mm Water inlet diameter: 0.19 inch/5 mm Operating mode: Brushless DC design, mains operation, 300 hours continuous life Vinyl tube: Length: 39.37 inch/400 cm Color: As shown Material: PCB+PVC Package content: 4*Capacitive soil moisture sensors 1*4-channel 5 V relay module 4*Water pumps 1*4 M water pipe Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3 cm.