Features: 1200mA large capacity battery, type-C charging interface, standby for time is 240-360 minutes. Infrared optical detection technology, more accurate and high precision you could get. It detects all day and care for the for health of your family. It can overcome the influence of temperature difference on detection accuracy. Two power supply modes: battery and USB two ways to supply the power. easy to use and very fast. l Specifications: Color: White/ Black Size: 90mm/3.5 in x 70mm/ 2.8 in x40mm/1.6 in Temperature: 1-70 Display Model: LED+LCD+Backlight Voltage:5V Battery Capacity: 1200HMA CO2 Instructions: 0-799ppm: Green flashing 800-1199ppm: Yellow Flashing 1200-1599ppm: Orange Flashing 1600-1999PPM: RED Flashing 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. Package includes: Type 1: 1 x White Air Quality Detector with Battery Type 2: 1 x Black Air Quality Detector with Battery