1、[Highly Sensitive Probe] PH sensor uses a highly sensitive probe, insert the probe into the soil, you can measure the desired value. 2、[Plug And Play] Soil PH meter use without batteries, plug and play, simple operation can test the PH value of the soil. 3、[Value Meaning] The probe of the detector in the middle is neutral soil (PH value of 7), to the left for alkaline soil. To the right for acidic soil. 4、[Object Of Use] Detector only tests soil, etc. It is not applicable to dry flour, small stones, wood and wood chips, etc. 5、[Convenient] Soil PH analyzer is made of ABS material, hard and reliable, small size, light weight, very convenient and handy. 1 x Soil PH Meter1 x Instruction Manual Item Type: Soil PH MeterMaterial: ABSGross Weight: Approx. 28g/ 1.0ozProduct Length: Approx. 14cm/ 5.5inProbe Length: Approx. 9cm/ 3.5in