Three functions in one handheld unit - Measures carbon dioxide content, temperature and humidity at the same time for reliable indoor air monitoring. Dynamic two-line LCD display - The two-line screen shows all three metrics at once, so you can read the current air status without switching modes. Battery preserving design - Automatic shut-off conserves battery life and keeps the meter ready when you need it. Portable and easy to use - Compact handheld form for quick checks in any indoor space. Key benefits and practical use scenarios - Why you need it: helps you monitor air quality, maintain comfortable temperature and humidity, and identify conditions that may affect health or productivity. - What sets it apart: simultaneous three-parameter readings on a single, easy-to-read display with automatic power-saving. - Where to use it: at home during daily activities, in the office to support comfortable work environments, and in classrooms or schools to ensure safe, well-ventilated learning spaces. Consistent with original specifications - 3-in-1 measurements (CO2, temperature, humidity) with a 2-line LCD display and automatic shut-off for battery efficiency. - Handheld, portable design suitable for indoor air quality monitoring.