specifications: Material: ABS (housing) and FR4 CCL (test object) Color white Working voltage: 3V Working current: 10uA Battery: 1 * 3 V 225 mAh CR2032 button battery (NOT included) Power Rating: 0.03W How to use: Step 1: Before using for the first time, open the top cover and pull out the inner plastic plate. Step 2: Insert the sensor of the soil tester into the soil. Step 3: Click the power button. Step 4: Wait and use light colors to see if there is more or less moisture. Product features: Stylish appearance: lightweight, mainly made of ABS (housing) and FR4 CCL (test disc), durable, small, easy to carry, more suitable for potted plants. Real-time monitoring, plug and play: Simply insert the soil tester into the soil of the plant root and wait a few seconds until the results are clearly displayed. One-button detection: Simple operation, one-button detection, two intelligent modes and three types of detection help you to identify plant growth more easily. Let our soil tester be a small pot partner! Light color / soil moisture / planting recommendation: red light, 0% ~ 15%, less moisture; Green light, 16% ~ 60%, suitable humidity; Blue light, 61% ~ 100%, more moisture. WARNING: Keep button batteries out of children’s reach: - Keep coin-sized button batteries and devices out of sight and out of reach. - Examine devices and make sure the battery compartment is secure. - Dispose of used button batteries immediately. Flat batteries can still be dangerous. - If you suspect a child has swallowed a button battery, immediately go to a hospital emergency room. Do not let the child eat or drink and do not induce vomiting. - Call the Poisons Information Centre on Australia 13 11 26 or New Zealand 0800 764 766 for additional treatment information. - Tell others about the risk associated with button batteries and how to keep their children safe.