Amazon.com has CIS 7-in-1 Air Quality Monitor, Indoor Humidity Monitor, Temperature, CO2, TVOC, HCHO, Time, Date Display Desktop Air Quality Tester, Air Quality Meters for Home Office Hotel Restaurant School on sale for $17. Shipping is free w/ Prime or on $35+ orders.
About this item
- 【Multi-function All-in-One】: 7-in-1 air quality monitor to accurately monitor your environment! It not only displays CO2 level, humidity, temperature, HCHO, TVOC in real time, but also updates the date and time in real time. Provide perfect guarding for your indoor space!
- 【Intuitive Display】:With a vivid LED screen, our air quality tester for home makes complex data easy to understand and quickly accessible. Easily gain clear insights into the health of your environment, day or night. It is your ideal companion to create a healthy living space.
- 【Smart Energy Saving Design】: Your convenience comes first! Tap the 'M' button on the humidity monitor to simply switch between Celsius and Fahrenheit. Indoor air quality monitors CO2 levels in real time. Once the CO2 exceeds 1880ppm, an instant beep will notify you.
- 【Compact and Convenient】: Whether you are at home, traveling with your family, or ensuring the safety of special spaces such as mother and baby rooms, schools, restaurants, etc., our air quality tester is a reliable companion to take care of every breath with ease.
- 【Hassle-Free Rechargeability】：After 30 minutes of operation, the home air quality tester automatically enters energy-saving mode. Provides continuous monitoring without sacrificing alertness. Rechargeable battery plus USB-Type-C charging cable keeps your air quality detector fully charged.
https://www.amazon.com/dp/B0CWS5317P
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do not waste your money, wait for an expert compared unit
I recommend this website for independent reviews
https://breathesafeair.
since it has wifi it can be checked remotely
but more importantly it has a real PM2.5 sensor unlike the $17 unit
if tariffs ever end it might drop below $50
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