1, the working voltage: DC45-55V2, Working current: Mean Less than 60mA; 150mA.3, the detection range: 0-5000ppm4, the detection accuracy: (50ppm + 3% reading value)5. Warm-up time: 3minthe output signal:1) analog output voltage: (D1 port 0V-25V) (D2 port 04-2V) linear output.2) serial port (UART) (TTL level)3) PWMresponse time: T90 Less than 120sthe working temperature: 0 ~ 50CelsiusHumidity: 0 ~ 95% RHsize: 57mm x 35mm x 15mmweight size: 17gColour:As shownMaterial:PC+metalPackage 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.