Gas Detectors features: CO2 Concentration Detector Indoor Pollutant TVOC Air Quality Analysis Temperature and Humidity Detection Portable Detector Color: we send based on the color or size of the main image of the product page. Quantity：we send based on quantity on title, if there is no quantity in the title, we send based on description. The carbon dioxide detector supports carbon dioxide detection, TVOC air quality, temperature and humidity detection and so on. It's a nice helper for wine brewing, greenhouse fruit and vegetable planting,warehouse CO2 detection,etc. Features: The carbon dioxide detector can display the current CO2 data, as well as the temperature and humidity data. Carbon dioxide measurement ranges is 400-6000PPM. The colored circle will change according to the CO2 conten. More accurate detection, 1S/time real-time refresh, quick detection, can obtain more stable measurement values. Real-time monitoring pollution data, real-time display of the carbon dioxide concentration and TVOC value per cubic meter. Simple operation. No need to calibrate after starting up, work and detect automatically. L-ED digital display + 2.8inch LCD full-color screen, let you read more in tuitively. 1500mAh large-capacity battery, TYPE-C recharging interface, 480 mins long standby time. Can be used at various occasions such as agricultural cultivation, greenhouse vegetables, production warehouses,raw materials processing, home, educational institutions, vip sports, office, etc. Specifications: Item Color: Black,white (optional) Battery: Lithium-battery 1500mAH Charging Mode: USB Type C Interface CO2 Detection Range:400~6000 PPM CO2 Detection Sensitivity: 1 PPM Applicable Temperataure: -10~60℃ Item Size: 89 * 70 * 35mm / 3.5 * 2.76 * 1.38in Item Weight: 140g / 4.94oz Package Size: 141 * 98 * 48mm / 5.55 * 3.86 * 1.89in Package Weight: 240g / 8.47oz Packing List: 1* Carbon Dioxide Detector 1* Instructions 1*USB Cable