Features: There are 2 standard, long/short size, length: 22.5cm/30cm, probe length: 11cm/18cm, pick your own. Soil measuring instrument to test the soil moisture, pH and fertility value, helps you accurately grasp the for time and amount of water you need to water the plants. No batteries needed, just insert the sensor probe into the soil about 2-4 inches, toggle switch to test moisture, pH, fertility value you would like to measure. Detecting and analyzing soil moisture , pH acidity and fertility value detection , sensitively detect changes in soil. Design to be lightweight and portable, easy to carry around. for ideal soil test tool kit for home plants, garden, lawn and farm. Specifications: Material: ABS+Metal Length: 22.5cm/30cm, probe length: 11cm/18cm(optional) Package Includes: 1x Soil Tester note: Please allow 1-3cm error due to manual measurement. pls 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.