Usage Tips:1. High-precision Sensor Technology: Equipped with a semiconductor TVOC sensor and a electrochemical detection module, this air quality monitor ensures accurate and stable performance with excellent interference resistance. It provides reliable readings for pollutants such as carbon dioxide, carbon monoxide, temperature, humidity, and formaldehyde. 2. Multi-functionality with Large Display: The co2 meter features a large screen display that shows clear readings, along with additional functionalities like displaying time, date, serving as an alarm clock, and a stopwatch. It offers convenience and versatility in one device. 3. Real-time Monitoring and Historical Data: With the Graffiti Smart App, you can monitor real-time air quality data and access historical records. Stay informed about the air quality in your environment and make necessary adjustments to a healthy living space. 4. User-friendly Design for : The pm2.5 pm1.0 pm10 pm10 hcho tvoc co co2 meter is designed with low power consumption and a long usage lifespan. Its user-friendly interface and advanced features easy to operate and integrate into your daily routine, ensuring lasting value for your investment. Specification: : Paint & Decorating Gas Type: Multifunctional With LCD Screen Or Not: Yes Model Number: Air Quality Monitor Is Smart Device: no Built-in lithium battery: 2000mAh Battery voltage: 3.7V Charging: about 3-4 hours Available time: about 6-8 hours Function: detect formaldehyde, carbon dioxide, carbon monoxide, TVOC, pm2.5, pm1.0, pm10, temperature, humidity, display time, date, timing, stopwatch, alarm clock, Tuya smart connection Note: Due to different production batches, the label words on the product are random. The actual product may have slight differences or color differences. This does not affect the applicability. Material: plastic colour: black Package Contents: 1 x Air Quality Monitor Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.