Features: Large Display Screen: This CO2 monitor with a large display screen for you to see the detecting data more clearly, you can get the results easily. Portable Size: This monitor is small in size and you can use it on your desk without taking up too much desk space, also easy for you to carry. Screen Brightness Adjustable: The brightness of the screen can be adjusted according to your needs, you can easy reading even in dark environments. Wide Applications: This CO2 monitor can be used in your home, office, destop, hotel and other places. Built-in Lithium Battery: This CO2 monitor using built-in large capacity to supplys power, you can recharge it in time. Specifications: Material: ABS Color: black Temperature measuring ranges: 0~50 Error: 1 Humidity measuring ranges: 25%~95% Error: 5% CO2 measurement ranges: 400ppm-5000ppm Battery: 1 * lithium battery, 2000mAh (included) Item weight: 160g / 5.6ounce Package size: 114 * 94 * 62mm / 4.5 * 3.7 * 2.4in Package weight: 195g / 6.9ounce Packing list: 1 * CO2 Monitor