Description: 【Comprehensive Monitor】: This 3-in-1 detector accurately measures carbon dioxide (CO2) levels, temperature, and humidity, providing essential data for maintaining a nice indoor environment 【Versatile Features】: Equipped with calibration functionality and a screen-off feature to conserve energy. Easily switch between Celsius and Fahrenheit to suit your preference, and control sound settings with the convenient on/off option 【Rechargeable Power】: Powered by a 1200mAh rechargeable battery, ensuring long term performance without the need for constant battery replacements 【Compact Design】: With dimensions of 70mmx35mmx90mm, this air quality monitor is compact enough to fit seamlessly into any space while still delivering powerful performance 【Easy Handling】: Designed for ease of use with intuitive controls that make it simple to monitor your environment effectively and efficiently   Specification: Material: PP Battery: 1200mah Size Chart: 7cmx3.5cmx9cm/2.76inchx1.38inchx3.54inch Package Includes: 1x Air Quality Meter 1x USB Cable 1x Manual Note: Please allow slightly errors 1-2cm/0.39-0.79inch differences due to manual measurement.