The HydraGO and HydraGO FLEX represent the most advanced portable soil sensor system. Simply insert the probe into the soil, and tap on the “Sample” button in the HydraGO app. The HydraGO and HydraGO FLEX communicate wirelessly with your smartphone or tablet using Bluetooth. Both systems features a rugged, Delran housing that contains a rechargeable battery. The internal battery will last for long field sessions with repeated and frequent data samplings. The HydraGO has a probe on the end of a shaft for easy surface measurements. It includes 4 segments so that the size can be adjusted from 25 to 84 cm (10 to 33 inches).