Features: Advanced sensors technology delivers real time formaldehyde detection and multi gas monitoring, offering precise air quality analysis for homes, offices, and sensitive environments like schools. Compact plastic housing with a built in rechargeable battery enables portable operations for 24+ hours, eliminating battery replacements while traveling or testing multiple rooms. Ideal for families, frequent travelers, and property managers overseeing newly renovated spaces requiring continuous air safety verification. Monitor airbornes risks in nurseries, hotel rooms, or post renovation living areas through its instantly read display that simplifies data interpretation for all age groups. Combines formaldehyde detector, TVOC trackers, and PM2.5 sensors in handheld device, featuring large LCD with backlight for low light environments and elderly users. Specifications: Component: Plastic Size:Approx.170mm/6.69''x31mm/1.22''x24mm/0.95'' Package Includes: 1Set Air Quality Detector note: Please allow 1mm errors due to manual measurement. Due to the differences between different monitors, the picture may not reflect the actual color of the item.