Widely used in aquarium, glass fishpond, mining, pharmaceutical research, agriculture, laboratory, water environment, colleges and universities, quality control and other fields. This soil detector is simple to use. Just insert the product to the soil and wait a few seconds to see the moisture, sunlight intensity and PH of the soil, so that you can improve the soil environment in time and make plants healthier. Features: A set of three instruments is convenient for you to detect water quality and soil. Let your plants grow in a more comfortable environment. The digital PH pen is equipped with automatic temperature compensation function. You can use the bufferpowder to calibrate the tester. TDS meter has locking and automatic turn off functions (please note: this meter cannot test seawater.) Press the button, it can display the data of water purity level in PPM (part per million) on the screen. Also this instrument can test water temperature. The soil meter can test the soil PH/moisture/sunlight intensity, and help you control the PH/moisture/sunlight intensity in the soil. (Note: this tester is only used to test soil.) Easy to use, accurate measurement results, accurate and stable readings can be displayed in a few seconds. Compact, convenient to carry and convenient to use. LCD backlight display for clear reading, support night monitoring. Specifications: TDS&EC Meter: Color: blue Conductivity: 0-9999 us/cm 2 Temperatures: 0.1-80 / 32-176 2 TDS: 0-9999 ppm 2 Battery: 1 * CR2032, 3V, 240mAh Item size: 153 * 30 * 14mm / 6.0 * 1.2 * 0.6in Item weight: 44g / 1.5ounce PH Tester: Color: yellow+black Measure range: 0.00-14.00PH 0.01PH Battery: 2 * LR44, 1.5V, 160mAh Operating temperature: 0-60 Item size: 153 * 30 * 16mm / 6.0 * 1.2 * 0.6in Item weight: 44g / 1.5ounce Soil Detector: PH measuring range: 3.5-8.0 Humidity: 0-10 (the higher the value, the higher the humidity. Recommended humidity 4-7) Sunlight intensity: 0.001-1000 (the higher the value, the higher the sunlight intensity) Total length: 250mm / 9.8in Test rod length: 175mm / 6.9in Item weight: 54g / 1.9ounce Package size: 350 * 100 * 20mm / 13.8 * 3.9 * 2.0in Package weight: 260g / 9.2ounce Packing List: 1 * TDS&EC Meter 1 * PH Tester 1 * PH TestPaper 1 * Soil Detector 3 * PH BufferPowder (4.01+6.86+9.18)