Mini Air Quality Monitor: Can measure CO2, temperature(/) and humidity at the same time, very suitable for home and office. With backside hole, you can hang the air quality monitor on the wall.<br>High Accuracy Sensor: Adopts infrared sensor to measure CO2, temperature and humidity, which is more accurate, more reliable and more durable than traditional electrochemical sensors.<br>Automatic Alarm System: When the CO2 value exceeds 1500PPM, an alarm will be issued automatically, you will hear beep sound, which notify you to keep the indoor environment ventilated in time.<br>Large Screen Display: Clear and easy to view, and designed with colorful indicator light to show CO2 levels(1-700PPM green, 70-1500PPM yellow, 1500-5000PPM red), suitable for using in bedroom, office, school, car, etc.<br>Built-in Rechargeable Battery: Built-in 2400mAh large capacity lithium battery that can be recharged by provided USB charging cable, long working time and quick charging.<br>Features:<br>Mini Air Quality Monitor:<br>Can measure CO2, temperature(/) and humidity at the same time, very suitable for home and office. With backside hole, you can hang the air quality monitor on the wall.<br>High Accuracy Sensor:<br>Adopts infrared sensor to measure CO2, temperature and humidity, which is more accurate, more reliable and more durable than traditional electrochemical sensors.<br>Automatic Alarm System:<br>When the CO2 value exceeds 1500PPM, an alarm will be issued automatically, you will hear beep sound, which notify you to keep the indoor environment ventilated in time.<br>Large Screen Display:<br>Clear and easy to view, and designed with colorful indicator light to show CO2 levels(1-700PPM green, 70-1500PPM yellow, 1500-5000PPM red), suitable for using in bedroom, office, school, car, etc.<br>Built-in Rechargeable Battery:<br>Built-in 2400mAh large capacity lithium battery that can be recharged by provided USB charging cable, long working time and quick charging.<br>Specifications:<br>Color: Black<br>Sensor: Infrared Sensor<br>Detection CO2: 400-5000ppm<br>Detection Temperature: -10 to 40/ 14 to 104<br>Humidity Range: 0%-99% RH<br>Power supply: Built-in 2400mAh Lithium Battery<br>Charging: 5V 1A USB<br>Item Size: 9.8 * 9 * 4cm/ 3.9 * 3.5 * 1.6in<br>Packing List:<br>1 * Air Quality Monitor<br>1 * USB Charging Cable<br>1 * Users Manual(English & Chinese)<br>