The large number display screen is clear at a glance. Quick measurement within 3 seconds. Humanized design, durable quality, easy to carry. Four modes: one-key switching, sensitive detection, accurate measurement of different types of readings, etc. Four Functions: 1. Measure the current ambient light intensity: low, low, low+, N-, N+, HGH-, HGH, HGH+ 2. Measure soil moisture content: dry, dry, wet, wet+ 3. Soil temperature measurement: Temperature measurement range: -9~+50 (16~122) 4.3. Measuring the pH value of the soil PH value measurement range: 3.5-9.0 Use: Step 1: Switch the humidity/temperature/light or pH/light position as needed. Step 2: Insert the probe into about 2-4 inches of soil. Step 3: Check the humidity/pH/light/temperature level in the turntable within 3 seconds. Step 4: After each use, remove the probe from the ground and clean and wipe it. Specification: Size: 340 * 63 * 36mm Probe length: 195mm Battery: 9V battery (not included) Note: 1. Not suitable for liquids, testing, only for soil testing. 2. With a 2.9V battery, the screen only displays green and no numbers are displayed, which means that the battery is exhausted. 3. If the soil is too dry, please moisten it before testing. 4. If the soil is too dry and fertile, please sprinkle some water and test again after half an hour. Package included: 1 x Tester