Control Wizard Accurate pH 8 ACCURATE PH 8 Professional pH and Moisture Meter with 12" probe. Operation is simple. Clean the electrodes and place the meter into the soil. A pH reading is automatically displayed. Press the white button and a moisture reading is displayed. It works by utilizing the electronic ground field effect of the earth and two dissimilar metals. No batteries are required. 1 year limited warranty.  | Manufacturer's Product Information |  | | | — Ships from SS: WA, CA, CO, MI, TN, PA, FL USA. |