DIY Soil Moisture Detection Automatic Watering Pump Irrigation Kit 1. This DIY electronic watering kit automatically and efficiently waters your plants and flowers based on soil conditions. 2. Easy to install; no programming is required, and no single-chip microcomputer is included. Simply follow the circuit diagram for easy assembly. 3. The DIY module with a soil probe provides intelligent detection and sensing functions. 4. Connect the relay module and sensor to the power and ground terminals. The white wire from the water pump connects to the negative terminal of the power supply, the red wire connects to the normally open contact of the relay, and the sensor's DO terminal connects to the relay's input port. The sensor is then connected to the soil probe. 5. Power can be supplied by a portable power supply (5V DC) or four AA batteries (not included). Kit Includes: - Relay module x 1 - Soil moisture probe + comparator module x 1 - Small water pump x 1 - Battery pack x 1 - USB power cable x 1 - 50cm silicone hose x 1 - Dupont wire x 10