Please be kindly noted，the listed product is produced and distributed abroad and subject to the laws of its country of origin。    This product is a carbon dioxide detector, which can automatically detect carbon dioxide concentration, temperature and humidity, detect air quality, and protect your breathing health.    Features:  1. 3-in-1 detector: It can accurately detect carbon dioxide concentration, temperature and humidity, with stable performance and strong anti-interference ability.  2. Non-dispersive infrared absorption: The carbon dioxide value tester adopts the non-dispersive infrared absorption principle, built-in automatic calibration algorithm, high sensitivity and low power consumption.  3. PC mirror control panel: The display interface of the carbon dioxide detector adopts PC mirror material, which has good surface finish, good toughness, damage prevention and pressure resistance, and the display effect is clear and more intuitive.  4. Simple operation: It adopts a single button design, which can be started and used by pressing it, and the CO2, temperature and humidity values can be displayed intuitively, avoiding complicated operations, fast, convenient and clear, and the readings are clear at a glance.  5. Over-limit alarm: When the monitoring environment carbon dioxide concentration exceeds the standard, the reading of the carbon dioxide detector will increase, the indicator light will be red, and an alarm will sound.    Note:  1. Due to manual measurement, there will be a 1-2 mm error in the size. Thanks for your understanding.  2. Due to different light conditions and different monitors, item color displayed in photos may be showing slightly different from real object.    Specifications:  Color: White  Material: ABS + Electronic Components  Screen Size: 84*74mm  Display Mode: Digital Display  Resolution: 240*240  CO2 Measurement Range: 400-5000PPM  Temperature Measurement Range: -10℃~70℃  Humidity Measurement Range: 0-99.9%RH  Accuracy: ±( 50ppm + 5% Reading ) / ±0.3℃ / ±2%RH  Measurement Method: CO2 Gas Sensor / Temperature And Humidity Sensor  Unit Of Measure: PPM / °C / %RH  Alarm Upper Limit:  GOOD: 400-1000ppm  NORMAL: 1001-2000ppm  POOR: 2001-5000ppm  Working Band: 4.26um  Response Time: <120S  Charging: USB-Type C 5V  Battery: 3.7V 1600mAh Lithium Battery  Working Environment Temperature: -10℃~+50℃  Item Size: 9*8*4cm / 3.54*3.15*1.57in ( L*W*H )  Packing Size: 10.2*9.2*7cm / 4.02*3.62*2.76in ( L*W*H )  Net Weight: 113g / 3.99oz  Gross Weight: 237g / 8.36oz    Package List:  1 * Detector  1 * USB Charging Cable  1 * Instruction Manual ( English + Japanese )