•3 in 1 air quality monitor, accurately detect the level of CO2, Temperature and Humidity •Adopted high precision infrared sensor and high-performance chip, providing fast and reliable detection •Easy to check the real-time data on the colorful LED display with large digits, fast capturing the results •4 flashing indicator levels demonstrate different CO2 concentration, the alarm will be given out when value exceeding 1000PPM •Built-in 2000mAh large capacity lithium battery, get rid of cable annoyance, flexible to use and charge •Palm size with lightweight, perfect for home, school, office, hotel, warehouse and other environments Specifications: •Material: ABS •Voltage: DC 5V •Screen: Color LED Display •CO2 Detection Method: Infrared (NDIR) •CO2 Detector Range: 400-5000PPM •Real Time Reading: 1S •Alarm Sound: ＞1000PPM •CO2 Indicator: •0-999PPM: Green Light Flash •1000-1999PPM: Yellow Light Flash •2000-2999PPM: Orange Light Flash •3000-3999PPM: Red Light Flash •Above 4000PPM: 4 Lights Flash •Battery: 1 * 3.7V Lithium Battery •Item Size: 137 * 80 * 35mm / 5.4 * 3.1 * 1.4in •Item Weight: 165g / 5.8oz Package included: •1 x Carbon Dioxide Detector •1 x USB Cable •1 x English and Chinese User Manual