Builtin alarm function: alerts you when CO2 levels exceed safe limits, enabling proactive management of indoor air quality. Broad suitability: ideal for households, offices, and individuals with respiratory sensitivities who require reliable and safe air monitoring. Clear, easy to read data: compact small air quality tester with an LCD display that delivers accurate readings of CO2 concentration, temperature, and humidity in a userfriendly format. precision monitoring: digital CO2, temperature, and humidity measurements provide a trusted tool for maintaining a healthy environment and monitoring air quality over time. Practical, realworld use scenarios: In the home, place in living rooms or bedrooms to maintain comfortable and healthy indoor conditions. In office environments, use in conference rooms or workspaces to ensure proper ventilation during meetings and daily activities. In classrooms, clinics, or other spaces with respiratory sensitivities to support safe and controlled air quality. Key attributes and performance: combines alarm functionality, LCD display, and precise digital readings in a compact, easytouse device designed for continuous air quality monitoring and quick healthfocused decisions.