KeeYees 5 Pcs High Sensitivity Soil Moisture Sensor Module with Female to Female Jump Wires Sensor Module Watering System Manager for Arduino

Specification: - Chip: LM393 (stable operation) - Operating voltage: 3.3V-5V - Power Indicator (RED) - DO LED(GREEN) - Mode: Dual output mode (accurate output) Wiring Instructions (Four-Wires): - VCC: 3.3-5V - GND: GND - DO: Digital Output Interface (0 and 1) - AO: Analog Output Interface Package Included: 1 x Soil Moisture Sensor Module Tips: According to our experience, these modules are good for short term projects since the working principle of them are resistive soil moisture sensors. Although the surface is nickel-plated, and it has a wide sensing area, the conductive strip of copper on them are oxidized and corroded away if you use them for a long time. We suggest you buy our capacitive soil moisture sensor (Asin: B07R174TM1) if you are willing to pay more.