Just insert the capacitive sensor into the soil, you can real-time soil moisture data, external screen, motherboard, you can talk to your plants! See if your beloved plant is thirsty and needs some! Applications: garden plants; Moisture detection; Smart agriculture, note: the humidity is when the voltage is small, the humidity is small, when the voltage is, please go back to confirm with the multimeter measurement. Specification. Operating Voltage: 3.3-5.5Output Voltage: 0-3.0Interface: PH2.54-3R Size: 98x23mm (LxW) Material: ABS Shell: Black Package Content: 1 Set x Capacitive Sensor (10PCS) 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 to be slightly different from the real thing. The allowed measurement error is +/- 1-3cm.