[5-in-1 Indoor Air Monitor]Our air meter can accurately evaluate 5 air parameters at the same time. These include concentrations of carbon dioxide (CO2), formaldehyde (HCHO), natural and synthetic volatile organic compounds (s), temperature (°C/°F) and humidity (%). [Shorter Measuring Time (30 Seconds)]Based on the old air monitor, we use a more powerful sensor chip, shortening the measuring time to 30 seconds. And this indoor air tester provides a more accurate and consistent assessment of air parameters [Real-time Monitoring and Buzzer Alarm]After 30 seconds of testing time, the air detector monitor will update the measurement data in real time. When "poor" air levels are reached, the alarm goes off. [Air level indication] There will be level indications below the measurement data (CO2, HCHO, ), divided into GOOD (safe), OK (need attention), and POOR (danrous). When the air level reaches the "POOR" level, the alarm will sound. [Built-in 3.7V lithium battery]There is a power indicator light on the screen of the indoor air monitor. When the battery power is too low, the battery symbol box is empty, indicating that the power is about to run out, please char it in time., Manufacturer: SLZJWLPPA