Product Functions: Test items: sunlight, moisture, pH value, temperature Moisture: 5 levels (DRY +, DRY, NOR, WET, WET +) pH measuring range: 3.5 to 9.0 (display resolution 0.5) Soil temperature measuring range: -9 C to 50 C (display resolution 1 C / 1 F) Sunlight: 9 levels (LOW- LOW LOW + NOR- NOR NOR + HGH- HGH HGH +) Power source: a 9V battery (not included) Product dimensions: (main unit) 4.8 * 2.45 * 1.42 inch (probe) 0.2 * 8 inch 1. 4-in-1 plant soil tester kit: Test the soil moisture (5 levels), the pH value (3.5 to 9.0.12 levels), the sunlight intensity (9 levels) and the temperature (- 9 C to 50 C; 16 F) - 122 F) so that you can easily see the condition of the plant. (NOTE: Do not use it for direct testing of pure water and other liquids.) 2. Large backlit LCD display: This floor tester uses a large LCD display to easily display a variety of measurements, and a green backlight allows you to read parameters in the dark. 3. USEFUL OPERATION: Connect a 9 V battery, remove the protective cover of the probe and switch it on. Insert the probe straight up and down. The four indexes of the detected area are displayed on the LCD screen. Powered by a 9 V battery (not included). An automatic switch-off function helps to extend the battery life 4. Indoor and outdoor design: Ideal tool for testing the soil conditions (moisture / light / PH) of fruit, flowers, vegetables, shrubs, etc. Light and portable design, suitable for indoor and outdoor use. 5. High efficiency: This soil moisture meter saves time and energy with high efficiency and is an excellent tool for garden and plant cultivation. Know when to water flowers and plants indoors and outdoors, adjust the pH or change the lighting.