Intelligent Soil Moisture Detector, Instant Horticultural Plant Flower Soil Humidity Meter Detector Working Voltage: 3V Operating current: 10uA Battery: 1 x 3V CR2032 button battery (not included) Rated power: 0.03 W. Measuring range: 5% Red light: lack of water. Green light: good for hydration. Blue light: Too much water. how to use: Step 1: Before first use, please open the top cover and remove the inner plastic plate. Step 2: Insert the soil tester sensor into the soil. Step 3: Press the power button. Step 4: Wait and use a light color to identify whether there is more or less moisture. Note: The picture is for reference only, please refer to the actual product, thank you. ! ! Product Name: Soil Moisture Meter. Material: ABS White color Dimensions: approx. 131*25.1*10.9mm/5.16*0.99*0.43inch Weight: approx. 30g Package contains: 1 piece