• Clocks4-IN 1 AIR QUALITY MONITOR - Particulate matter (PM 2.5), humidity, temperature and time. PM2.5 is a major component of air pollution, and fine particles smaller than 2.5 micrometers (PM2.5) can move deeper into the respiratory tract when inhaled. You need to have an indoor air quality monitor for your family.
• PROFESSIONAL PRECISION DESIGN - This indoor air quality meter has advanded high-quality sensor that reflects air quality by detecting PM2.5 particulate matter. Reasonable inlet and outlet duct design enables internal sensors to accurately analyze each particle. Update PM2.5 index every 5 seconds and temperature and humidity every 30 seconds, more comprehensive understanding of the air quality.
• FULL VA-LCD COLOR SCREEN - Multi-color screen adopts omni-directional viewing angle technology, from any angle you can clearly see the PM2.5 indicator, temperature, humidity and time displayed by this air quality monitor indoor. The screen brightness can be adjusted through the buttons on the back.
• EASY TO USE - This indoor air quality tester only use 4 buttons achieve all operations. The air quality detector is plug and play, it uses a MicroB USB port, plug in the data cable to get PM2.5 index, temperature, humidity and time (unplug the time will change to the default time 12 :00)
• PACKAGE INCLUDES - 1 × air monitor, 1 × User Manual, 1 × Micro USB Cable ( Input: 5V, 500mA; Length: 3.3 Ft ). Updated version: updated USB port, more durable; The detection accuracy of PM2.5 index and temperature and humidity is optimized. If you have any quality problems, please hesitate to contact us, we will try our best to help you selve problems.

Manual Instruciton
download pdf.