Bulb Planting Tools features: 3 in1 Soil Tester Water Light PH Moisture Test Meter Plants Flower Humidity Garden Color: we send based on the color or size of the main image of the product page. Quantity：we send based on quantity on title, if there is no quantity in the title, we send based on description. 1. Specifications: Material: Plastic. Body size: 26 * 6.2 * 4cm. Probe length: 17cm (can not be placed directly in the water to measure the water will damage the electrode ). Wet reading range: 0DRY-10WE. Reading light range: 0DARK-2000LIGH. PH measuring range: 3.5-8. Multi-function: can check humidity / light / PH value. 2. Method of use: 1. When measuring soil pH and humidity, first insert the probe into the soil as deep as possible. (10CM has been on). 2. Move the button on the pen to MOIST, MOIST is the moisture key, the corresponding table is MOIST, DRY is dry, WET is wet, the value 1-3 (red part) indicates that watering is needed, 4-7 (green Part) is suitable, 8-10 (blue part) means it is too wet. Please adjust the watering time according to the variety of plants. 3. Move the keys on the pen to PH, PH is the pH key, the corresponding table is the value of 8-3.5, ALKALINE is the alkali, ACDIC is the acid, and the value 7 is basically neutral. Adjust the soil pH according to the plant species. 4. The LIGHT key is the illuminance. The measurement range is 0-2000 lumens. The larger the value, the stronger the light. 5. When using it, pay attention not to touch the stone when inserting the electrode. Do not use excessive force, otherwise it will easily damage the electrode. Wash the electrode after use. 3. Matters needing attention: 1. Attention friends ~ Before inserting the soil, please soak the soil with water. The probe should be inserted into the soil at a depth of 2/3 (more than 10CM) to measure accurately. 2. Be careful not to touch the stone when inserting the electrode during use. Do not use too much force, otherwise it will easily damage the electrode. After use, the electrode should be cleaned in time. 3. Can not be used in the soil for a long time To avoid damage. 4. The products are made in China, mainly foreign trade. No Chinese instructions, please don't mind 4.Soil pH: Soil pH is also called "soil reaction". It is the acid-base reaction of the soil solution. Mainly depends on the concentration of hydrogen ions in the soil solution, expressed in pH. A solution with a pH value equal to 7 is a neutral solution; a pH value less than 7 is an acidic reaction; a pH value greater than 7 is an alkaline reaction. Soil pH can generally be divided into the following levels: PH value Soil pH. ¡¥ 4.5 Very strong acid. 4.5¨ 5.5 Strong acid. 5.5¨ 6.5 acid. 6.5-7.5 Neutral. 7.5-8.5 alkaline. 8.5¨ 9.5 Strong alkaline. ¡¦ 9.5 Very strong alkaline.