Features: Combine pump, pipe, soil moisture sensor, and 4-channel 5V relay- modules in plant irrigation system. All the modules are provided and the wires are soldered- and nicely packed in one for case.You can just interface the sensors, pump and valves with it and then get started with the watering project. The sensors measure the volumetric- content of water in soil and give you the moisture level and digital output. You can have the system to water your plant automatically or doing it yourself with the push of button. The system will automatically water your plants-. When your soil gets too dry, the pump kicks in and the water flows into the pipes and pans. When you go on vacation, you don'for t have to worry about your plants-. Specifications: Material: plastomer Operating voltage-: 3.3~5.5 VDC Output voltage-: 0~3.0 VDC Interface: PH2.54-3 Size: 98x2M (L x for W) Pin: Analog signal output, GND, VCC- 1 way 5V relay- module: VCC-: Connect to 5V positive power supply GND: connects to 5V negative power supply Mini water pump: Dc- voltage-: 3-5V Outlet outer diameter: 0.29 inch /7.5mm Inner diameter of outlet: 0.17 inches /4.5mm Inlet diameter: 0.19 inches /5mm Drive mode: brushless DC- design, mesh drive 300 hours continuous working life Package Includes: 1 x development board, 1 x 1.5m blue USB cable, 4 x capacitive soil moisture sensor, 1x4 channel 5V relay- module, 4 x mini water pump, 1 x 5M vinyl tube, 1 x 20 pin 20cm M-F jumper, 1 x 20 pin 20 for cm M-M jumper, 1 x 20 pin 20 for cm Jumper note: Please allow 1-3cm error due to manual measurement. please make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item.