Features: *Comprehensive Monitoring: The 3 in 1 Handheld carbon dioxide Meter provides real-time measurements of carbon dioxide levels, temperature, and humidity, making it an essential tool for assessing indoor air quality effectively. *Dual-line LCD Display: Featuring a dual-line LCD display, the device shows carbon dioxide concentration alongside temperature and humidity simultaneously, allowing for easy monitoring and analysis. *Color-Coded Alerts: With its green, yellow, and red backlight prompt function, users receive immediate visual alerts regarding air quality, timely actions can be taken to improve conditions. *Automatic Shutdown: Designed with an automatic shutdown function to conserve battery life, this meter ensures long-term usability without the hassle of frequent battery replacements. *User-friendly Design: Lightweight and portable, this handheld device is suitable for various environments such as homes, schools, and offices, enhancing air quality management in public spaces. Specifications: Part Name:3 in 1 Handheld carbon dioxide Meter Material:Plastic Size:150*52cm Color: Black + Red Measurement range: 400-5000ppm Model:S8601 is a semiconductor sensor, S8601A is an infrared sensor Package Content: 1*Handheld carbon dioxide Meter Note: 1. The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness. 2. Please allow slight manual measurement deviation for the data. [COMPREHENSIVE MONITORING] This 3 in 1 Handheld Carbon Dioxide Meter provides real-time measurements of carbon dioxide levels, temperature, and humidity, making it an essential tool for maintaining optimal indoor air quality. [DUAL LINE LCD DISPLAY] Featuring a dual line LCD display, the device allows simultaneous monitoring of concentration alongside temperature and humidity for thorough analysis. [COLOR CODED ALERTS] Equipped with green, yellow, and red backlight alerts, users receive immediate visual notifications about air quality, enabling timely actions to improve conditions. [AUTOMATIC SHUTDOWN] Designed with an automatic shutdown feature to conserve battery life, long-term usability without frequent replacements. [USER FRIENDLY DESIGN] Lightweight and portable, this handheld device is perfect for homes, schools, and offices, enhancing air management in various public spaces.