*The hygrometer is operated by resistance and has automatic temperature compensation. * Automatic shutdown 5 minutes after the last operation. Data retention function. Low battery alert. * Portable, compact and easy to use, moisture measurement readings are instant. * Digital display with backlight provides accurate and clear readings even when you are in dark conditions. * By monitoring dryness you can save time and money, and help prevent moisture deterioration and decay during storage, so handling will be more convenient and efficient., Manufacturer: CFWWSAQ