Description: The carbon dioxide detector features long standby time, which needs no frequent charging. The carbon dioxide detector adopts infrared technology, which supports high-precision measurement. Made of plastic and metal, the carbon dioxide detector is eco-friendly and durable to use. The ventilation holes in the back not only accelerate the convection between the air and the product, so as to achieve effective detection, but also improve heat dissipation. The length of the carbon dioxide detector is 6.8cm, width is 7cm and height is 4cm. The carbon dioxide detector is widely used, which is suitable for many public places such as gym, cinema, school, office and so on. Item Name: Carbon Dioxide Detector Material: Plastic,Metal Style: A: Semiconductor, B: Infrared(Optional) Detection Technology: Infrared Detection Technology Display Mode: LED Digital Display + LCD Screen + Backlight Sensor: Infrared Sensor Charging Interface: Type-C, 5V Suitable Temperature: 1-70 Degrees Celsius Detection Range: 400-5000ppm Working Voltage: 5V Battery Capacity: 1200mAh(Included) Features: Mini, Sensitive, High Precision Size Details: 6.8cm x 7cm x 4cm/2.68" x 2.76" x 1.57" (Approx.) Notes: Due to the light and the screen setting difference, the item's color may slightly differs from the pictures. Please allow slight dimension difference due to the manual measurement. The product does not need calibration, it can work after start-up. Indicator Light: 0-799ppm: Green Light Flash 1200-1599ppmOrange Light Flash Over 1999 ppm: Four Color Flash Package Includes: 1 x Carbon Dioxide Detector 1 x Charging Cable 1 x User Manual