DIY 4-Way Relay Automatic Garden Watering Kit Description: 1. Ideal for effectively monitoring soil moisture and automatically watering your plants and flowers. 2. This capacitive sensor, placed in the soil around your plants, uses a second sensor and a mainboard to detect if the soil needs more water to replenish moisture and if it's dehydrated. When your soil is too dry, a pump activates, and water flows into the tube and vase. Capacitive soil moisture sensor: 1. Operating voltage: 3.3-5.5 VDC 2. Output voltage: 0-3.0 VDC 3. Interface: PH2.54-3P 4. Dimensions: 98x2m (LxW) 5. Pinout: analog signal output, GND, VCC 6. 1-Channel 5V relay module: - VCC: connect to a 5V positive power supply - GND: connect to a 5V negative power supply Mini water pump: 1. DC voltage: 3-5V 2. Outlet diameter: 0.29"7.5mm 3. Outlet inner diameter: 0.17" 4.5mm 4. Inlet diameter: 0.19" 5mm 5. Drive method: brushless DC design, mesh drive 6. 300-hour continuous operating life Vinyl tubing: 1. Material: PVC 2. Length: 39.37" 400cm 3. Material: ABS, electronic components Package contents: - Capacitive soil moisture sensors x 4 - 4-channel 5V relay module x 1 - Water pumps x 4 - 4M water hose x 1