Features: brand new and high quality Portable CO2 detector is easy to carry and can detect the gas quality in bedroom, living room, kitchen, office, car, school, hotel, campground and other environments. The 3.5-inch large color LED display shows the concentration of carbon dioxide, temperature and humidity, power, for time, date and data at a glance. Low consumption and long service life. Accurate detection of carbon dioxide. Large screen showing power, CO2, Temperature and humidity. The special quality electrochemical detection module is adopted, with good precision, stable performance, strong anti-interference ability, low consumption and long service life of the box body. It is a kind of high quality air quality detector, using good quality electrochemical detection module, good accuracy, stable performance, strong anti-interference ability. Specifications: Material: ABS Size: 150x110x80mm/ 5.9x4.33x3.14 in Color: White/ Black Reaction time: <1s Test temperature range: -10 ℃ - 70 ℃ Humidity test range :0-99% RH Working voltage : 5V/1A adapter charging Maximum power charging current: 600mA 3.7V Lithium battery Battery capacity : 3x AA Charging mode: type-c Package Includes: 1x Air Quality Monitor 1x Charging Cable 1x Manual note: Please allow 1-3cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item.