Real Instruments Hygrometer Indoor Thermometer Digital Temperature & Humidity Meter Room Climate Indicator With Calibration Touchable Night Light, Comfort Display Max/min Data All-in-One Digital Moisture Measurer  (30 mm)

Its accurate temperature and humidity monitor, you will know when to use the heater, cooling fan, air conditioner, humidifier or dehumidifier. It also keeps records of Max and Min readings since powered on. Keeping the room temperature and humidity appropriate is not only beneficial to people's health, but also to the maintenance of furniture and electrical equipment in your home. You can sit it on your desk, or hanging against the wall. With the 15 seconds backlight, it's suitable for anywhere in the room, even the dim place. This little compact gadget allows you to check the temperature, humidity, highest/lowest records, as well as time and date, all at a glance.