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Feature: 【3-Level Air Comfort Indicator】Humidity meter with humidity level icon indicates DRY/COMFORT/WET air condition quickly with just a glance. Ensures proper humidity, great for monitoring family's living conditions and health by preventing colds, dry skin, asthma, allergy, mold etc. 【Clear LCD Display, Easy to Read】Humidity temperature gauge with 3.34 inch large LCD display features neat and slim border, easy to read from any angle and distance. While it's portable and lightweight to take it anywhere easily. ℉/℃ Switchable by "+", 12h/24h selector by "-". NOTE: No backlight function 【High Accuracy & Fast Refresh】Digital indoor thermometer refreshes every 10 seconds to provide you updated and the lastest readings. Wide measuring range that measures temp from 14.2˚F~140˚F(-9.9℃ ~ 60℃) and humidity from 10% ~ 95%. The temp accuracy range around ± 1℃ while humidity accuracy is ±3%RH 【Smart Design with 3 Mounting】Humidity temperature gauge has multiple mounting options: Tabletop Stand, Magnetic Back, Adherency Mount. With adhesive pads and built-in magnet, you can stick or place anywhere you like such as fridge, counter, living room, baby room, kitchen, basement, office, greenhouse, guitar room, office, garden and cellar 【Battery Powered & Time Setting】Coming with 1 CR2032 button battery, each battery can last 8-12 months working. thermometer features day and time shown. Long press the 'Set' button can enter the time setting. Specification: Temperature range: -9.9 ℃ ~ 60 ℃ (14.2˚F ~ 140˚F) Humidity range: 10% ~ 99% Accuracy: temp ± 1 ℃, humidity ± 3% RH Update rate: 10 seconds Product size (weight): 70*70*15mm (65g) LCD Screen Size: 3.34" / 8.5cm Package Contents: 1 * Temperature and Humidity Meter 1 * User manual 1 * Metal adhesive pad Humidity indicator: The comfort level icon in the center of the screen clearly indicates the home environment based on the relative humidity (RH). Dry (orange): The humidity is less than 30%. Comfort (green): Humidity is between 30% and 69%. Wet (blue): Humidity is above 70% How to set: 1. normal mode: ‘+’: ° C / ° F switch '-': 12 / 24H format 2. day / time mode 'SET' button: long press 'SET' button enter day / time. Press again enter month / day / hour / minute. +/-: Up / Down, press and hold to get a quick setting NOTE: 1.When the humidity is between 30% and 69%, the small triangular arrow still points to the center of "comfort". 2. do not place the hermometer and hygrometer in an environment with extremely high or low temperatures, as this may damage electronic parts and plastics. 3. remove the batteries from the device if you want to store it for a few months.