Portable LCD CO2 For Home 1200mah Professional 400-5000ppm Black Description: Carbon dioxide concentration detection, thermometer and hygrometer in caliber. Simple operation: button to turn on and off. No ma calibration needs after startup, operation and automatic detection. Battery: built-in 2000MAH lithium battery, charging. CO2 . Displays current CO2 data as well as temperature and humidity data, the colored circle will change depending on the CO2 content. LED digital display, LCD screen, compact and portable, can be placed in kitchen, bathroom, living room, desk, coffee table and other environments. Specifications: Size: 71x91x36mm or 2.8x3.6x1.4 inch Display mode: digital display LED LCD screen backlight Sensor: solid-state sensor Charging Port: Type C 5V Detection Range: 400-5000ppm Operating Voltage: 5 V Electric Capacity: 1200MAH The package includes: 1 piece host 1 piece usb charging cable 1 piece instruction