PM2.5 Air Quality Module is an ambient air quality testing Module. This product adopts PMSA003 digital universal particulate matter concentration sensor. It can quickly collect and calculate the number of suspended particles of different particle sizes in the air per unit volume. The simple and reliable design makes it possible to quickly deploy nodes and be used in life or industrial scenarios, as environmental data collection, or to provide real-time and accurate concentration data for instruments or environmental improvement equipment related to the concentration of suspended particulate matter in the air. DC 5V power supply. Compatible with stackable and extension system. M5Core pedestal (Pin out SPI/I2C/Power) Applications:mbient PM2.5 measurement Note:due to different production batches, the printing screen printing/appearance is different, which does not affect the use. Colour:White and Gray Material:Plastic Package Contents: 1 x PM2.5 Air Quality Module 2 x screw(The color is random, and the designation is not accepted) 1 x HEX KEY(The color is random, and the designation is not accepted) Only the above package content, other products are not included. Note: Light reflection 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.