Description: Carbon dioxide concentration detection, thermometer, and hygrometer in one. Simple operation: one button to turn on and off. No need to calibrate after starting up, work, and detect automatically. Battery: Built-in lithium battery 2000MAH, Type-C Charging. CO2 Detector. It displays the current CO2 data, as well as the temperature and humidity data, the colored ring will change according to the CO2 content. LED digital display, LCD screen, compact and portable, can be placed in the kitchen, bathroom, living room, desk, coffee table, and other environments. Specification: Display mode: LED digital display + LCD screen + backlight Sensor: Semiconductor sensor Charging port: Type C 5V Detection range: 400-5000ppm Working voltage: 5V Electric capacity: 2000MAH Size Chart: Size: approx. 142x80x35.5mm / 5.59x3.15x1.40 inch Package Includes: 2 x Host 2 x USB Charging Cable 2 x Manual Note: Color might be slightly different due to the color calibration of each individual monitor. Please allow slightly measuring deviation due to manual measurement.