Carbon Dioxide Checker, CO2 Monitor, CO2 Concentration Meter ①

I purchased this after seeing it trending online (the idea that CO2 levels in your room can unknowingly rise during study or work, leading to decreased concentration).

To use it, simply turn it on.
When it detects a level above a certain threshold, it alerts you with a beep, serving as a guide for ventilation.

I thought it was so good that I bought two and used them, but I haven't been using them recently, so I'm selling them.

It is in working condition.
I will wipe it down with alcohol and ship it in its original box.
All accessories are included.

*Please note: It has a built-in rechargeable battery, but it runs out quickly (this is also mentioned in Amazon reviews and has been the case since the beginning). Therefore, it's best to assume you'll be using it plugged into the cord.

*Also, subjectively, since this model is much cheaper than the one that was trending in Japan (which costs over 10,000 yen), the accuracy of the detection is more of an estimate.
However, it does accurately show an increase when you exhale onto it, and my child seemed interested.

This device measures CO2 concentration, temperature, and humidity.

- Model: H8 Plus
- Charging method: Type-C
- Voltage: 5V DC
- Battery capacity: 1200mAh
- Measurement range: 400-5000PPM

Thank you for looking.