Lutron PMS 714 Moisture meter All in one digital soil meter, easy to make operation, Data hold function to freeze the desired value on display, Microprocessor circuit ensures high accuracy and provides special functions and features, Operates from DC 1.5V ( UM4/AAA ) x 4 PCs batteries, Built-in low battery indicator, Durable, long-lasting components, enclosed in strong, compact ABS-plastic housing, Designed to check the moisture level of soil or other similar material, Used the 2 pins electrode to measure the conductive Principal ability of the species, then converter to the reading of " % " Moisture content " of soil sample.