1. Most potted plant deaths are caused by water shortage or overwatering. This soil humidity sensor will whistle when the soil is dry to remind you to water your plants, helping prevent damage from underwatering. 2. No need to read numbers on indicators—just respond when it signals, making plant care easier. 3. The cute design doubles as a decorative ornament for flowerpots, enhancing the look of your garden or indoor space. 4. Simple to use: remove the plastic tab at the bottom to activate. Insert the probe into the soil. It will emit bird or frog sounds when the soil is dry, and stop singing once adequate moisture is detected. 5. Powered by a standard button battery that lasts up to a year. Features a built-in light sensor that automatically disables sound at night to avoid disturbance. To activate, remove the insulating film under the bird seat. To disable the sound, press both probes simultaneously or insert them into wet soil. After inserting into moist soil, the device should stop singing within seconds. If it continues, check your plant’s water level. The optical sensor ensures silent operation at night but may briefly sing during daylight to indicate power status. Watering guidance: When the device sings, it indicates the plant needs water. Color: Yellow Material: Resin Size: 18 x 9 cm Package Contents: 1 x Soil Moisture Meter Note: Clean the probe tip regularly with fine abrasive paper or steel wool for optimal performance. The sensor can detect soil pH and low soil fertility. If the device continues to sing after watering, test the soil pH. Ideal pH range for most indoor plants is between 3 and 8. Content in package is limited to the items listed above; other accessories are not included. Note: Lighting and display differences may cause slight color variations between the product image and actual item. Measurement error allowance is +/- 1-3 cm.