- Built-in alarm function alerts when CO2 levels exceed safe limits, enabling immediate ventilation and proactive management of indoor air quality. - Suitable for health-conscious individuals and spaces including homes, offices, schools, and areas with respiratory sensitivities, providing a safe and healthy environment. - Featuring LCD display, the Small Air Qualities Tester delivers accurate readings of CO2, temperature, and humidity; compact and user-friendly. - High precision digital CO2, temperature, and humidity meter ensures reliable data for ongoing air quality monitoring and decision making. - Key attributes: 3-in-1 measurement (CO2, temperature, humidity), compact size, clear LCD readout, and an integrated alarm for easy, at-a-glance monitoring. - Use scenarios: use at home to monitor room occupancy and cooking effects on CO2; place in an office meeting room to ensure adequate ventilation during discussions; deploy in classrooms to maintain comfortable learning conditions and air quality.