Purchase options:
A: M5S
B: M5S+ lithium battery
C: M5S+ temperature and humidity
D: M5S+ temperature and humidity + lithium battery
E: M5S+ temperature and humidity + TVOC + lithium battery
F: M5S+ temperature and humidity + TVOC + USB data export
G: M5S+ temperature and humidity + TVOC + USB data export + lithium battery
H: M5S+ temperature and humidity + CO2+ lithium battery
I: M5S+ temperature and humidity + TVOC + CO2+ lithium battery
J: M5S+ temperature and humidity + TVOC + CO2+ lithium battery + USB data export
Standard measurement:
CN standard PM1.0, PM2.5, PM10
US standard PM1.0, PM2.5, PM10
Six parameter number of particles
AQI Air Quality Index
PM2.5 pollution level indicator
HCHO concentration
Optional measurement:
CO2 concentration
Temp&Humi
TVOC, benzene
USB Data output
Lithium battery
Please choose the option that suits you!

Features:
1. Full color large screen, showing richer content
2. Purification effect, detecting air pollution
3. Multi-parameter display, simple and precise interface
4. No need to calibrate, refresh in real time.
5. Multiple interface switching
6. Super sensor technology
7. Boot automatic detection, no complicated operation

Specifications:
HCHO:
Resolution: 0.001mg/m3
Range: 0-1mg/m3
Error: ±5%
PM2.5:
Resolution: 1μg/m3
Range: 0-1000μg/m3
Error: 10%
PM1.0:
Resolution: 1μg/m3
Range: 0-500μg/m3
Error: 10%
PM10:
Resolution: 1μg/m3
Range: 0-3000μg/m3
Error: 10%
Temperature:
Resolution: 0.1 ° C
Range: -10-75 ° C
Error: ±0.3 °C
Humidity:
Resolution: 0.1% RH
Range: 0-100% RH
Error: ±3% RH
Particulates:
Resolution: >0.3μm, >0.5μm, >1.0μm, >2.5μm, >5.0μm, >10μm
Range: 0-10μm
Error: 50% & 0.3μm & 98% ≥ 0.5μm
CO2:
Resolution: 1ppm
Range: 0-10000ppm
Error: ±50ppm±3% reading
TVOC:
Resolution: 0.01mg/m3
Range: 0.01-10mg/m3
Error: ±20%
Size: 82x61x40/50/60MM
Power supply: Micro USB 5V&1A

Payment Way:
Please know we just accept paypal payment, thank you!

Shipping Details:
We will send out the package during handing time, you can receive it in expect delivered time normally, if not, please contact us, we will be responsible for it, thanks!

Return Details:
We offer 30 days money back guarantee return policy, however, our warranty does not extended to any ducts that are physically damaged or that are not under normal operating conditions as a result of misuse or imper installation on the buyer/user's part.

About Us:
If you have any question, please contact us by "Ask a question", we will work with you to until you are satisfied, and our normal business hour is Monday to Friday 9:00 AM to 6:00 PM Hong Kong time GMT+8, all messages and orders will NOT be cessed at weekend and holidays, if you are satisfied at our service and duct, please kindly leave  us a positive comment Green Color + and 5-star (Yellow color) Detailed Seller Ratings, we will automatically leave positive feedback after received positive feedback from you.