This air detector can help you check the air condition, which is a great helper for household detection, greenhouse planting, warehouse CO2 detection, etc. Features: Compact size and light weight, portable and convenient to use and carry. Equipped with quality temperature sensor and humidity sensor for fast and accurate detections. The 2.8 inch LCD screen with backlight can clearly display the current values of CO2, temperature and humidity. The colored circle will change according to the current CO2 value. Easy to use, no need to calibrate after booting, it can work and detect automatically. Support 240-360 minutes standby time. Widely applied to home use, educational institutions, agricultural cultivation, greenhouse planting, warehouse operation, material processing, etc. Features: Color: White/Black (optional) Charging: USB Type-C interface CO2 detection range:?400 ~ 5000?PPM Sensitivity of CO2 detection?:?1PPM Applicable temperature?: -1~+70 Package size:?140*125*42mm/5.5*4.9*1.7in Package weight:?165?g / 5.8?oz Packing list: 1 * air detector 1 * USB cable 1 * User manual (English)