If you want to know everything about the soil in your garden or if you want to study the ideal location for planting your plants, this soil meter is a very useful tool. Perfect for indoor and office plants to effectively and quickly check where to place them. It runs on solar energy and consists of two measuring probes and a solar cell. - Indicative measurement of the humidity value near the roots - Measurement of the PH of the soil - Measurement of the brightness outdoors