This air detector can help you check air conditions and is a good helper for home testing, greenhouse planting, warehouse CO2 testing, etc. Features: Small size, light weight, portable, easy to use and carry. Equipped with high-quality temperature sensor and humidity sensor, detection is fast and accurate. The 2.8-inch LCD screen with backlight can clearly display the current values of CO2, temperature and humidity. The colored circle changes based on the current CO2 value. The operation is simple, no calibration is required after starting up, and it works and detects automatically. Supports long standby time of 240~360 minutes. Widely used in household use, educational institutions, agricultural cultivation, greenhouse planting, warehouse operations, material processing, etc. Specifications: Color: white/black (optional) Charging: USB Type-C interface CO2 Detection range: 400~5000PPMCO2 Detection sensitivity: 1PPM Applicable temperature: -1~+70 Packing size: 140 *125*42mm / 5.5*4.9*1.7in Packing weight: 165g / 5.8oz Packing list: 1 * Air detector 1 * USB cable 1 * User manual (English)