The CJMCU-30 digital gas sensor SGP opens up new possibilities for indoor air quality measurements. The SGP is a metal oxide gas sensor with multiple sensing elements on a single chip that provides detailed information on air quality. These sensing elements have ability to withstand fouling gases in practical applications, resulting in excellent long-term stability and low drift. The I2C interface, as well as a waterproof and dustproof protective film, make SGP easy to integrate into a of applications, such as and smart home devices. VCC: 3V-5V Type: Voltage Regulator Condition: New Supply Voltage: 3-5V Model Number: SGP30 Gas Sensor colour:Purple Material:plastic Package Contents: 1 x Gas Sensor Only above package content, other products are not included. Note: Light and different displays may cause color of item in picture a little different from real thing. The measurement allowed error is +/- 1-3cm.