Bullet Points:1Auto Alert:Carbon Dioxide Detector is especially suitable for use in the car. When PM2.5, PM10, formaldehyde, TVOC, carbon monoxide, or carbon dioxide exceeds the standard, it alarms automatically. 2Designed with 2 unique holes on the back, the CO2 Monitor can be easily hung on the wall. It comes with ventilation holes that will offer great heat diipation. 3Simple to Use:If it is the first time you use our Air Quality CO2 Detector, you may place it in a ventilated area for more than 30 minutes to ensure that the environment is free of irritating gases. 4Universal Application:Ambient temperature and humidity can be clearly displayed by the Carbon Dioxide Detector. It is very compact that is suitable for cars, offices, and home. 5Multi-function CO2 Detector:The Indoor Carbon Dioxide Monitor can be used to detect CO2 concentration, PM2.5, TVOC, PM10, humidity, and temperature in real-time. Our Air Quality CO2 Detector is using uses an NDIR sensor, which can accurately monitor CO2 concentration, PM2.5, TVOC, PM10, humidity, and temperature in real-time. It is widely used for offices, gyms, and schools. 1. Easy to use, auto alarm alert function. 2. 6in1 CO2 monitor, multiple usages. 3. Compact and portable, easy to carry. Product parameters Name:6in1 Carbon Dioxide Detector PM2.5 detection range:0-999ug/m3 PM10 detection range; 0-999ug/m3 HCHO detection range:0-9.999mg/m3 TVOC detection range:0-9.999mg/m3 C0 detection range:0-1000PPM C02 detection range:400-5000PPM Charging method:USB500 mA Type-C interface Product size:70*90*35mm/2.7*3.5*1.4inch Built-in Li-ion battery 3.7V, 1200mAh Charge 2-3 hours, available for 240-360 minutes Packing List 1* detector 1*Manual 1*charging cable