Air Quality Monitor Digital Display CO2 PM1.0 2.5 10 Temperature Humidity Detector with Low Battery Warning Item Type: Air Quality Monitor Material: ABS Atmospheric Pressure: 86Kpa to 106Kpa CO2 Detection Method: Infrared (NDIR) PM Detection Method: Scattering Sampling Time: 1.5 Seconds Size: Approx. 145x78x97.2mm/5.7x3.1x3.8in Detection Temperature: -10℃ to 50℃ Relative Humidity: 20% to 85% Storage Temperature: -10℃ to 60℃ CO2 Concentration Unit: PPM PM Concentration Unit: ug/m³ Battery: Rechargeable Lithium Battery 3000mAh x 1 (Included) Power Supply: 5V DC Power Supply Via Micro USB Port CO2 Technical Specifications: Measurement Range: 400-5000PРМ CO2 Sensor: Infrared (NDIR) Resolution: 1 PPM PM2.5, PM10, PM1.0 Specifications: Measurement Range: 0 to 999ug/m³ Measurement Principle: Scattering Resolution: 1ug/m³ Temperature and Humidity Technical Specifications: Measurement Range: -10℃ to 50℃ Measurement Accuracy: ±1℃ Humidity Range: 20% to 85% RH Measurement Accuracy: ±4% RH