Features: 1. The Sensor Is Made Of High-Quality FR-04 Double-Sided Material, With A Large Area Of 5.0 x 4.0cm. The Is Treated With Nickel Plating, Which Has Superior Performance In Terms Of Oxidation Resistance, Conductivity, And Lifespan. 2. Comparator Output, Clean Signal, Good Waveform, Strong Driving Ability, Over 15ma 3. Distribution Potentiometer To Adjust Sensitivity 4. Use Wide Voltage LM393 Comparator 5. Equipped With Fixing Bolt Holes For Easy Installation Description: 1. Output Form: Digital Switching Output (0-1) And Analog Ao Voltage Output 2. Working Voltage 3.3V-5V 3. Color: As shown 4. Material: PCB+Plastic Package Contents: 20 x Sensor Module 20 x Rainwater Module 20 x String Data Lines 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 a little different from the real thing. The measurement allowed error is +/- 1-3cm.