[More than 100,000 CO2 monitors] 　We have sold more than 100,000 units of our carbon dioxide (CO2) measuring instruments, which have been introduced in various places. 　Due to its reliability, more than half of them have been introduced in government offices and schools nationwide. [Easy to understand both visually and intuitively] 　Color & Numeric & Alarm will inform you of the carbon monoxide concentration. It can be identified by color according to the density, and the text is large and easy to see. 　You can set the timing of ventilation yourself, and you will be notified by an alarm. [You don't have to worry about where to put it] 　The back side is a magnet and sticks to various places. 　It comes with a stylish carabiner strap that looks great in camping, so you can hook it. It is compact and does not take up much space. [Cool design in earth tones] 　A stylish and cool design that fits in with campsites and the outdoors. 　Earth tones go well with any gear and will satisfy even the most discerning people. [Measured value: 0~500ppm] 　Carbon monoxide is said to cause symptoms at 200 ppm, but depending on the physical condition and individual differences, some people may experience initial symptoms such as headaches at 100 ppm. 　This product can measure from 0 ppm, so you can rest assured. [With snooze function] 　A repeated alarm will remind you until the carbon monoxide concentration value drops. 　It's safe even if you end up getting upset. [Can be used for about 60 hours] 　Built-in 1000mAh large-capacity lithium-ion, can be used for up to 60~100 hours with a full charge of about 4 hours (depending on operating conditions and environment). It is safe even for consecutive nights. 【Rechargeable】Rechargeable, so it is eco-friendly and convenient. It is a USB charging of TYPEC. 【Temperature & Humidity can also be measured】Temperature and humidity can also be measured, so it can be used not only in autumn and winter, but also throughout the year.