CO2 Monitor Far Infrared 400 to 5000PPM Accurate Measurement Minus10°C To 50°C with USB Charging for Rooms Offices Item Type: CO2 Monitor Material: Plastic, Glass Weight: Approx. 473g / 16.7oz Size: Approx. 270 x 90 x 35mm / 10.6 x 3.5 x 1.4in Working Voltage: 5V Maximum Power Charging Current: 1000mA CO2 Detection Range: 400 to 5000PPM CO2C Test Accuracy: 400 to 1000ppm, Deviation ±50ppm Above 1000ppm, Deviation ±5% Temperature Measurement Range: Minus10°C to 50°C Temperature Accuracy: ±1.0°C (0°C to 40°C) Humidity Test Range: 20 to 85%RH Humidity Accuracy: ±5% Battery Type: 18650 Lithium Battery (Ship with Inbuilt Battery) Battery Capacity: 1200mAh Full Power Working Time: 6 to 7h Charging Method: USB Charging Scope of Application: Home, Restaurants, Educational Institutions, Fitness Clubs, Schools, Libraries, Etc. Note: When Using for the First Time, Please Turn on the Device and Keep It for More Than 24 Hours, the Device Will Automatically Calibrate. (When calibrating, do not power off and restart halfway through)