Specifications: Item name: Mini CO2 Detector Exterior color: White Material: ABS+PC Sensor: NDIR Display: LCD display Preparation time: about 35 seconds Refresh rate: 2S 3 in 1: CO2 concentration/temperature/humidity detection CO2 detection range: 400-5000PPM(50PPM) Number precision: (50PPM+5%) Temperature range: 0C to 50C Humidity detection range: 0-99%RH Battery capacity: 1000 mAh lithium ion battery Charging method:USB Type-c Input voltage: DC5V 0.5A Charging time: about 2.5 hours Use time: about 24 hours Light indication: Green: 400-800 PPM, normal. Yellow: 801-1200 PPM, improve. Orange:1201-1500PPM, warning. Red: 1501-5000PPM, dangerous. Item size: Approx.73*73*18mm/2.87*2.87*0.70in Features: 3 IN 1 Multifunctional: This CO2 monitor can detect real-time CO2 concentration, monitor indoor and outdoor humidity, and temperature. CO2 detection range: 400-5000PPM. Temperature detection range: 0-50. Humidity detection range: 0-99%RH. The product is widely used in the crowded occasions, such as offices, greenhouses, farms, etc. It is an indispensable device for home or office. Mini: Small and portable, easy to carry, you can check air quality anywhere and anytime. With Intelligent early warning system, infrared NDIR sensor, multiple interference prevention. Unique Design: Four-color LED indicators, making the air quality more intuitive. Supports USB charging and power indicator, can charge 1000 mAh lithium ion battery, charging takes only 2.5 hours, and standby up to 24 hours. The back heat dissipation design can not only ensure that the sensor is in full contact with the air, but also facilitate heat dissipation. Multi Application: For home, school, office, travel, indoor, outdoor, agricultural planting, production warehouse, and other occasions. Package Included: 1x CO2 detector 1x USB data cable 1x User manual