This set of device can monitor the soil status of plants/flowers for timely watering and care for your plants/flowers. Features: Effectively monitors soil moisture and automatically waters your plants and flowers. Combines pump, hose, soil moisture sensors and relay module in one plant irrigation system, no additional accessories required. Stay informed about plant needs and water in time. You don't have to worry about leaving your plants unattended when you go on vacation. One set of equipment can connect four pots of plants at the same time. Specifications: Capacitive Soil Moisture Sensor: Operating voltage: 3.3-5.5VDC Output voltage: 0-3.0VDC Interface: PH2.54-3P Size: 98 * 23mm 1 Channel 5V Relay Module: VCC: Connect 5V Positive RodPower GND: Connect 5V Negative Rod Power Mini Water Pump: Direct-current voltage: 3-5V Outside diameter of wateroutlet: 0.29inch/7.5mm Inside diameter of wateroutlet: 0.17inch/4.5mm Water inlet diameter: 0.19inch/5mm Vinyl Hose: Material: PVC Length: 39.37inch/4m Package size: 230 * 180 * 30mm / 9.1 * 7.1 * 1.2in Package weight: 400g / 0.9lb Packing List: 4 * Capacitive Soil Moisture Sensors 1 * 4 channel 5V Relay Module 4 * Pumps 1 * 4m Hose