Description 4-IN-1: You can measure the soil PH value (3.5 to 9.0,12 levels), Sunlight Intensity (9 levels), Moisture (5 levels) and Temperature(-9C to 50C;16F- 122F) of the soil. Large Backlit LCD DisplayEasily displays various readings with the large LCD screen, and green backlight allows you read the index in dark condition.Powered by a 9V battery, not included in package. An auto power off function helps to save battery life.Also, theres low battery indication on the screen. Easy to usePlug a 9V battery(not include), remove the protective cover on the probe, and turn it on, insert the probe straight up and down softly, the LCD screen will display the four index of the detected area. Save time and energy with high efficiency, great tool for your garden and plants planting.Know when to water, adjust pH, or change lighting for your garden, flowers, plants both indoor and outdoor.You will have a green thumb after you own it The device cannot be used on artificial soil. Just feel free to contact us if you have any problems with MAOZUAs products, we will try our best to help you within 24 hours.