General EP8709 Digital Thermohygrometer w/ Bright Display

Ideal for accurately measuring any environment's temperature, relative humidity (rh),dew point and other condensation parameters. features jumbo backlit display with double field calibratable using optional 33 and 75 salts data holds max/min buttons also calculates and displays wet bulb temperature °f/°c switch 20-minute auto power off (can be disabled for calibration) low battery indicator includes sensor protection cap "9v" battery user's manual 1 year limited warranty.