1, the working voltage: DC4.5-5.5V2, Working current: Mean Less than 60mA 150mA.3, the detection range: 0-5000ppm4, the detection accuracy: (50ppm and 3 percent reading value)5. Warm-up time: 3minthe output signal:1) analog output voltage: (D1 port 0V-2.5V) (D2 port 0.4-2V) linear output.2) serial port (UART) (TTL level)3) PWMresponse time: T90 Less than 120sthe working temperature: 0 - 50CelsiusHumidity: 0 - 95 percent RHsize: 57mm x 35mm x 15mmweight size: 17gColour:As shownMaterial:PCandmetalPackage Contents:1 x MH-Z14A NDIR Infrared Carbon Dioxide Sensor ModuleOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is 1-3cm. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.