1.Wireless in/ out thermometer include 1 thermometer receiver and 3 wireless sensors. New features: 2.Audible Alarm SettingsThe digital in/out hygrometer thermometer for indoor outdoor console includes audible and visual alarms when temperature exceed the pre-set min and max alarm settings. Always be sensitive to the ambient temperature and humidity. To turn off the alarm function, long press SET/ALERTS button until alarm sign disappears. 3.Indoor/outdoor temperature and humidity range The indoor temperature Its temperature measurement range is wide enough to meet the daily temperature monitoring needs of the family. In addition, it can also choose two different temperature units, Celsius/Fahrenheit. 4.MAX/ MIN RecordMax/ Min temperature records provide historical temperatures readings in the past 24 hrs (begins from the moment you set up the base with batteries). The freezer thermometer monitors ambient temperature every ten seconds. LCD screen displays the current temperature clearly. Smartly monitor the temperature and humidity around you. 5.Multiple installation options A bracket is designed on the back of our receiver, and there are powerful magnets on it. So it has the functions of sucking, standing and hanging. You can stick it to the refrigerator with a magnet, and you are also putting it on the desktop or hanging on the wall of the room. You can choose the appropriate placement method according to different locations. For your home life, this is a very intimate smart thermometer.