6-in-1 MULTIFUNCTIONAL SOIL TESTER - This comprehensive tool allows you to monitor six essential factors for plant growth: soil moisture, pH, temperature, fertility, light intensity and ambient humidity. It provides accurate real-time data, indispensable for gardeners and farmers. INNOVATIVE DUAL PROBE TECHNOLOGY - This soil tester is equipped with an advanced dual probe system, made from durable alloy and aluminum materials. Sensitive probe delivers fast and reliable results. Just insert the probe into the ground and wait a few seconds to get an accurate reading. HD LCD Screen: The large high-definition LCD screen can clearly see the measured values, whether in daylight or in low light conditions. Ideal for indoor and outdoor use. Portable and Versatile: Designed for great flexibility, this tester is perfect for gardens, farms, greenhouses and potted plants. Without the need for an electrical outlet, it is easy to carry and allows monitoring of ground conditions anywhere, anytime. Easy to use: simply insert two AAA batteries, push the probe 2/3 into the ground, and press the power and test buttons. You will get accurate results in 10 seconds. Always clean the probe after each use to maintain sensitivity and ensure long-lasting performance. Fertility from 0 to 3000 μS/cm with a resolution of 1 μS/cm and an accuracy of plus minus 100 μS/cm; Soil moisture from 0 to 99% with a resolution of 1% (no precision data); pH from 3.5 to 9 with a resolution of 0.5 and an accuracy of plus minus 0.5 pH. Temperature from 0 to 50°C (32 to 122°F) with a resolution of 0.1 and an accuracy of plus minus 1°C (plus minus 1.8°F); Luminous intensity from 0 to 100000 Lux with a resolution of 1 Lux and an accuracy of plus minus 100 Lux; Air humidity from 0 to 99% with A resolution of 1 % (no accuracy data) If the device constantly shows '-' or the value remains frozen, gently clean the probe, turn it on in the open air, hold down the start button until 'pH' flashes to '7', then turn it off and do the test again.