Ulisem Soil pH Tester for Plants and Soils, Battery-Free, Non-Digital, Premium Needle Sensor

Reliable measurement results in all circumstances. With the hanging hole, it can be mounted on the wall or placed freely on a table. It can be used in homes, factories, offices, hotels, hospitals, laboratories, theaters, audio systems, etc. Soil moisture meter, hygrometer, pH meter, soil moisture monitor, gardening, plant, agriculture, light, sunlight tester. The instrument uses a precise optical structure; the light path is clear, the measurement is accurate, and the digital display shows the measurement data and surrounding information separately.