Temperature and humidity balance set: The outer watch features a built-in set of analog humidity meter and thermometer. Automatically measures the exact indoor/outdoor temperature from -40°F to 140°F (-40°C to 60°C), humidity readings from 0% to 100% relative humidity. Waterproof: The excellent rubber lining revolves around the silent quartz mechanism at the back, which closes the lid and closes tightly. The inside of the glass does not consist of steam, as the watch face is tightly closed. Silent mechanism: quiet seconds scorpion without ticking, ensuring a good sleep and work environment. Clear display and easy-to-read time with a large number inside, an ideal watch for outdoor or indoor suspension, dining rooms, living rooms, family rooms, bedrooms, kitchens, analog dual ambient temperature (Fahrenheit and °C) | Easy to use: Battery-powered, requires only AA carbon zinc battery (not included), (alkaline battery or rechargeable battery may have an impact on the default life of the watch movement, in addition to the accuracy of the time). Comes with a wide slot at the back for easy suspension. Note: Before use, please assemble all accessories to ensure the watch works effectively.