Features: Using professional infrared sensing detection technology, this CO2 meter has stable performance, and provide high accuracy and fast measurement response. Large LCD Screen, clearly show the datas of Carbon Dioxide, temperature and relative humidity.Wide application: Suitable for home, public site, agriculture, animal husbandry, industry, and more. With this CO2 monitor, you will know the actual level of carbon dioxide in the room to monitor the indoor air quality. It is important for our safety and health. It can be placed on desktop, light weight and small in size, easy to store and carry. Specifications: Item Type: Carbon Dioxide Monitor Material: ABS Color: White Display: LCD segment code screen Sampling Time: 4 seconds Display area: 35mmX50mm Power supply: DC5V/1A Detection principle: Infrared induction Resolution: 3ppm Sampling time: 4 seconds Effective range: 400-5000ppm Product size:80*50*80mm Package size: 11*11*6cm Package weight: 160g Package List: 1*Detector 1*USB power cord 1*User manual(English and Japenses)