Features Easy to Use: The test results can be obtained immediately by inserting the probe into about 2/3 of the soil. Accurate Measurement: The unique design of this soil tester can help you better catch the position facing the sun and collect more accurate values. Data Lock Function: The tester has a data hold key, you can press it to keep the data for more accurate and convenient data viewing. Easy Carrying: Comes with small size and lightweight, you can easily take this tester with you to help with your work. Applicable Scenarios: This tester is an ideal soil testing tool kit for family plants, gardens, lawns and farms. Specification: Item Type: Soil Tester Material: ABS, Metal Soil Temperature Range: - 20 ℃ to +70 ℃ (- 4 ℉ to +158 ℉) Air Temperature Range: - 10 ℃ to +50 ℃ (+14 ℉ to +122 ℉) Air Humidity Range: 20% to 99% RH Power Supply Mode: 1 x 9V 6F22 dry battery 280mAh (with) Probe Length: Approx. 22cm / 8.7in Basic Functions: Air temperature Air humidity Illumination display ℃ ℉ temperature switching display Data retention function Comfort display Key function: ON OFF: Switch on key, short press to turn on, long press to turn off for 3 seconds, and automatically turn off after 15 minutes without operation ℃ ℉: Switch the temperature unit to display in ℃ (Celsius) or ℉ (Fahrenheit) HOLD: Data locking Package List:1 x Soil Tester 1 x Manual  Note:Before using the machine, please open the battery compartment, remove the battery package and install the battery. Package List 1 x Soil Tester 1 x Manual