Feature: 1. [Save Space] The product is small in size, portable, easy to carry, does not take up too much space, and can be installed at home 2. [High Accuracy] Real time monitoring and display of carbon dioxide concentration per cubic meter, with accurate measurement results. 3. [Color Screen] This air quality detector has intelligent color screen display, clear numbers, easy to identify and read. 4. [Durable Material] The product is made of high quality ABS material, durable, and can be used with confidence for a long time. 5. [Widely Application] This product can detect carbon dioxide, temperature, humidity, formaldehyde and TVOC, widely used in offices, bedrooms, living rooms, gymnasiums, etc. Specification: Item Type: Carbon Dioxide Detector Model: ZN-2CO5 Material: ABS Battery: 18650 1500mAh 3.7V (Battery Included) Charging Power Supply: DC 5V 500mA Micro USB Application: Suitable for carbon dioxide concentration detection in offices, homes, gymnasiums and other usage scenarios CO2 Measurement Range: 400-6000 PPM ±50 ±5%PPM CO2 Measurement Accuracy: 1PPM TVOC Measuring Range: 0-2.0mg/m^3 HCHO Measuring Range: 0-0.6mg/m^3 Temperature Measurement Range: -10~50℃ Temperature Measurement Accuracy: ±1℃ Humidity Measurement Range: 0%~99%RH Humidity Measurement Accuracy: ±2%RH. Package List: 1 x Carbon Dioxide Detector (Battery Included)1 x USB Data Cable2 x Sticker1 x Wall Suction Bracket2 x Magnetic Metal Sheet1 x Manual Note: 1. This product has a built in lithium battery. When operating with a standard DC‑5V charger, do not block the air inlet and outlet to avoid value deviation.2. Do not use it frequently in a dusty environment with poor air quality to extend its service life.3. Do not use the device near high temperature, high humidity, dirt or strong magnetic fields, so as to avoid inaccurate values or internal circuit failure.4. Store the equipment and accessories in the temperature range of ‑20℃~55℃. When the ambient temperature is too low or too high, it may cause equipment failure.5. Please avoid exposure, rain or moisture of the equipment and accessories, otherwise it may cause failure or danger of the display, battery, casing and circuit.6. Do not insert pointed objects such as pins into the air inlet, outlet or charging space to avoid damage to the device.