Soil moisture meter Water level indicator Watering indicator for hydroponics Description: No batteries or electricity needed, plug and use. This water level indicator is used for flower pots. It can show the water level to remind you to water. If there is no water in the pot, the water level indicator buoy is at the bottom. With this in mind, pull the water level and water plants through the hole. Just insert the level into the soil and it will help your plants grow healthy and strong. A perfect tool for indoor and outdoor use. Specification: Material: Plastic Size: approx. 16.5 cm/ 20 cm/ 22.8 cm/ 36cm Package includes: 1 piece water level indicator Note: Do not pour too much water, it is better to let the buyo below the upper water mark.