Convenient3 in 1 meter to test soil moisture, PH value and sunlight at plant level without batteries, just insert the probe into the soil about 2-4 inches , then close the joystick to test what you want to measure. Helps you quickly harvest water specifically when your plants need it, control your soil's pH, and determine if you're getting enough sunlight. [BEST COMBINATION] 9 bonsai tools, super practical, you can place them in multiple convenient places for quick capture. FunctionThree in one humidity range: 1-10 (1-3 sec, 4-7 NOR, 8-10 wet), relative light: 0-2000lux (0-200 low, 200-500 low+ , 500-1000 NOR , 1000-2000 high), pH range: 3.58ph (3.56.5 acidic, 78 basic). Design An ideal tool for testing soil conditions (moisture/light/PH) of fruits, flowers, vegetables, shrubs, etc. inside and outside. Lightweight and portable design, convenient for indoor and outdoor use.