Fangrui Product Details 1. Integrated Sensors: Accurately Track Co2 Levels, Temperature, And Humidity With High Precision. 2. Smart Connectivity: Easily Connect To The Tuya Smart App Via Bluetooth For Real-time Monitoring And Adjustments From Your Smartphone. 3. Alarm Function: Includes An Alarm Clock To Keep You On Schedule While Monitoring Air Quality. 4. Versatile Use: Ideal For Homes, Offices, Or Any Indoor Environment Where Air Quality Is A Priority. 5. Enhance Your Comfort And Well-being With This All-in-one Air Quality Monitor And Stay Informed About The Conditions Of Your Indoor Environment. Specifications: Product Name:carbon Dioxide Detector Working Voltage:5v/2a Working Temperature:-1050working Humidity:~rh(no Condensation) Carbon Dioxide Range:400~5000ppm Temperature Detection Range: Celsius (-1099 Fahrenheit (-4210 Humidity Detection Range:~rh Wireless Protocol:low-power Bluetooth Due To Different Batches, There May Be Differences In Product Appearance And Printed Text, Which