Features: brand new and high quality High quality :The SGP30 is a metal oxide gas sensor with multiple sensing elements on a single chip. It integrates :four gas sensing elements with a fully calibrated air quality output signal. Wide usage :SGP is easy to integrate and integrates metal oxide gas sensors into mobile devices, opening up new possibilities for environmental monitoring in smart home, home appliances and IoT applications. Circuit is simple and reasonable structure, simple operation. Made of high-quality metal materials, wear-resistant and anti-corrosion, more stable performance and longer service life. Lightweight, easy to install and easy to operate. Adopt synchronous rectifier technology. Specifications: Working power voltage: 2V-5V Size: 13mmx 10.3mm Interface type: I2C Package Includes: 1 x SGP30 Measurement Gas Sensor note: Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!