The Hornady Wireless Touch screen Hygrometer is a square lok accessory perfect for ensuring your firearms remain rust free. The screen displays the high and low for both temperature and humidity in either fahrenheit or celsius. The large touch screen display and large lettering makes it easy to see. With the addition of powerful magnets and the square-lok mount, this hygrometer can be placed about anywhere.FeaturesRemote sensor measures temperature and humidity.Displays high/low for both temperature and humidity in either Fahrenheit or Celsius.Large touchscreen display.Snaps into the HornadyA(R) Square-Lok(TM) system.Integrated stand, powerful magnets, or HornadyA(R) Square-Lok(TM) mount allows placement anywhere.