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 the plants, helping prevent overwatering. 2. No need to read numbers on indicators—simply water when it signals. Makes plant care easier. 3. Cute design doubles as a decorative piece for flowerpots, enhancing the look of your garden. 4. Easy to use: remove the plastic sheet at the bottom to activate. Insert into soil—initial sound may occur, but stops when moisture is detected. 5. Powered by a standard button battery that lasts up to one year. Features a light sensor that automatically disables sound at night to avoid disturbance. After removing the insulating film, the device activates. To disable the sound, press both probes simultaneously or insert them into wet soil. Once inserted into moist soil, the sound should stop shortly. If sound continues, water the plant. The built-in optical sensor turns off the sound reminder at night but may emit a brief sound in sunlight to indicate power status. Watering: When whistling, watering is recommended. Color: Yellow/Black Material: Resin Size: 18 x 9 cm Package Contents: 1 x Soil Moisture Meter Note: Clean the probe tip periodically with fine abrasive paper or steel wool. This device does not measure pH or soil fertility.