All-in-one CO2 and air-quality monitor that measures carbon dioxide, temperature, humidity and TVOC for a clear picture of indoor conditions. Key benefits Detects poor ventilation and elevated CO2 so you can act quickly to improve air flow and comfort. Combines multiple sensors in one unit for easier, faster environmental assessment without separate devices. Stores detailed records so you can review trends and make informed decisions about heating, cooling, or ventilation adjustments. Alerts you immediately with an acoustic alarm when CO2 exceeds 1000 ppm, giving clear, actionable warning of significant air-quality change. Main features Multi-parameter monitoring: CO2, temperature, humidity and TVOC values all in one device. Smartphone integration: connect the detector to your smartphone to view real-time readings and access historical data for up to the last 60 days. Onboard data storage: retains up to 1440 data sets for comprehensive trend analysis. Audible alarm: acoustic alert activates at values above 1000 ppm to notify users of unsafe CO2 levels. Real-time feedback: continuous monitoring allows you to see immediate effects of ventilation or occupancy changes. How this solves problems Identify hidden indoor air issues: simultaneous measurement of CO2, humidity, temperature and TVOC reveals conditions that single sensors miss. Make practical improvements: use stored trends and 60-day historical charts on your phone to decide when to increase ventilation, adjust HVAC settings, or change occupancy patterns. Reduce guesswork: instant alarms remove uncertainty and prompt timely action when air quality deteriorates. Practical applications Home: Monitor bedrooms, nurseries or living areas to ensure safe ventilation and comfortable temperature and humidity for children and sensitive household members. Office and meeting rooms: Track CO2 and TVOC levels during meetings and high-occupancy periods to manage ventilation and maintain productivity. Schools, gyms and restaurants: Use real-time readings and historical trends to schedule ventilation, reduce stale air, and respond quickly to rising CO2 levels. What you should know Provides both immediate alerts and stored data for analysis, combining short-term safety (alarm at >1000 ppm) with long-term insight (up to 1440 stored records and 60 days of history). Simple smartphone connection makes monitoring accessible and actionable without complicated setup. Use this monitor when you need reliable, multi-parameter indoor air information, quick alerts to unsafe CO2 levels, and the ability to review past conditions to guide ventilation and environmental decisions.