This plant testing kit comes with a single probe. Compared to traditional dual probes, a single probe reduces damage to plant when inserted into the soil and doesn't require digging up much soil after testing. A reliable plant care too The soil moisture meter features a 90° rotating head, allowing you to bend from 0° to 90° for a comfortable reading position. No need to bend your knees when reading the dial This soil pH meter meets your needs for measuring soil moisture, pH, nutrients, sunlight, air humidity, and air temperature. It offers excellent value; compared to traditional single-function soil testers, you only need to purchase one unit to enjoy seven functions. It helps you gain a comprehensive understanding of your plants The portable and compact design allows you to use this plant moisture meter in home gardens, farms, lawns, and other soil types. Simply switch to the value you want to test, insert the soil moisture meter probe to 2/3 depth into the soil, wait a few seconds, and you get the test result from the indicator pointer, Weight: 0.27337320488 Pounds, Manufacturer: Aboiled