Feature:1. It can be used for family, laboratory, offices, hotels, schools, factories, conference rooms, airports, hospitals, restaurants, and many other public places.2. Large LCD screen, digital display, more intuitive, convenient.3. High precision, more accurate detection, can detect the environment at anytime and anywhere, to ensure timely detection of quality problem.4. Hook hole is set on the back of the instrument, which is easy to install, also can put on the table.5. With 3.5mm plug hole that can be used to connect external speaker(not included), more convenient to use.Specification:Condition: 100% Brand NewItem Type: Carbon Dioxide DetectorMaterial: Plastic + ElectronColor: As shown in the pictureSize: Approx.20.9x13x2.8cm / 8.2x5.1x1.1in Weight: Approx.572g/20.2ozEffective Range: 0~3000ppmMaximum Range: 0~5000ppmResolution: 1ppmAccuracy: ± (50ppm + 5% x display value)Single Response Time: <3sComprehensive Time: ≤25sSensor: For Plantower DS-CO2-20Power Supply Mode: DC5V 1A MICRO USB interfaceOperating Temperature Range: -10~+60°COperating Humidity Range: 10%~80% RHStorageTemperature Range: -20~+60°CMean Time Between Failures: ≥ 3 yearsAlarm Output: √Alarm Prompt: Sound + display alarm.w-e-text table td,.w-e-text table th,;.w-e-text table,Package List:1 x Carbon Dioxide Detector1 x Data Cable1 x Instruction ManualNote:1. Please allow 1-2cm error due to manual measurement. Thanks for your understanding.2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard.