Feature: 1. As a multi-functional electronic digital soil analyzer, this product mainly tests the soil humidity, PH value and illuminance. 2. Widely used in the field of irrigation fields, greenhouses, vegetables, flowers, plant cultivation, scientific testing. 3. Ultra-low power consumption, can be used without batteries, suitable for ergonomic, used in saving time and energy. 4. Accurate measurement, it is less affected by environment, suitable for a variety of soil environment. 5. Easy to operate and portable to carry around. High accuracy and fast response, providing fast, accurate and reliable reading data. Specification: Condition: 100% Brand New Item Type: Soil Tester Material: Plastic+Alloy Color: Black Size: Approx.28 x 6 x 2cm / 11 x 2.4 x 0.8in Probe Length: Approx. 18.4cm / 7.2in Weight: Approx. 101g / 3.6oz Use: 1. When measuring soil PH and humidity, insert the probe as deep as possible into the soil, leaving about 1cm above the probe. 2. Values 1-3(red part) indicate watering, 4-7(green part) is appropriate, please adjust the watering time according to the variety of plants, 8-10(blue part) indicates that it is too wet. 3. When you switch the button on the pen to the PH value, the corresponding figure in the table is 8-3.5, while the PH value is ALKALINE, ACDIC is acid, and 7 is basically neutral. The smaller the number, the higher the acidity. 4. Light key is for illumination, measuring range 0-2000 lumens, the larger the value, the strong the illumination, please decide whether to shade according to the variety of plants. 5. When using, please pay attention to the fact that the electrode should not touch the stone when inserting it, and do not use too hard, otherwise the electrode will be easily hurt. Wash the electrode after using it. Package List: 1 x Soil Tester 1 x Instruction Note: Please allow 1-3cm error due to manual measurement. Thanks for your understanding.