Description: You of plant with our meter, helps you specialize in grasping when you need to water your plant. Just insert the sensor probe into the to test moisture you would like to measure. Red indicator light for less moisture; green indicator light for proper moisture; blue indicator light for much moisture. No batteries needed, plug and read. Suitable for potted plants and any test. Specification: Material:ABS Size:13.2x2.5x1.1cm /5.20x0.98x0.43inch Package Includes: 1 Piece Meter : Please allow slight dimension difference due to different manual measurement.