Eco-friendly solution requiring no batteries or electricity; simply insert into the soil for immediate use. Constructed from premium quality plastic, ensuring safety and durability for long-lasting use. Clear visibility of the water level allows for timely and flexible watering, making plant care effortless. Each indicator measures 36 cm in length and 3 cm in diameter, designed to fit a variety of plant pots. Versatile and practical for a wide range of applications including hydroponic systems, cultivation pots, and flower boxes., Manufacturer: CTRLZS