4 in 1 Soil Moisture MeteThis 4 in 1 soil meter can test the soil pH, moisture, embient illumination, and temperature. You can now know when you need to water your soil by measuring moisture, pH & temperature value of the soil and sunlight level of surrounding environment, helps you take better care of flowers and plants. Large LCD Display with Sound AlarmThe soil ph meter adopts a large LCD screen to easily display a variety of readings. Upgraded light and sound alarm function. When soil moisture at DRY+ condition, the light is RED and sound BBB alarm; at DRY condition, the light is YELLOW and sound B-B alarm; at NOR condition, the light is GREEN. Accuracy and DurabilityThe probe detection technology strongly enhances the speed and accuracy of detecting and analyzing soil moisture, pH and temperature. With the light intensity of light sensor at the top, which can not be easily blocked during measurement. Wide ApplicationThe digital plant soil moisture meter can be used for your garden, farm, lawn, potted plants, succulent plants, etc. Suitable for both indoor and outdoor. Designed with lightweight and portable size, easy to use and carry. Easy to Use1. Just insert the sensor probe into the soil for about 4-6 inches (2/3 of the probe), . 2. Switch function keys to C or pH. 3. Read measured levels of the soil after 5-10 seconds. 4. Remove probe from the soil and wipe it clean after using.