VCCIs 5V And The Output High Level Is 3.3V, Which Can Be Powered By 5V. There Is A Voltage Conversion Chip Inside, But You Can Only Choose One Power Supply Mode Between 5V And 3.3V. If You Choose 33V, You Can No Longer Use 5V. If You Choose 5V, You Can No Longer Use It. Use 3.3V It Is A High-Precision, Small-Volume, Low-Cost Pressure Sensor. Can Be Used On Mobile Devices The Accuracy Can Be 0.03HPA, And The Power Consumption Is Low, Only 3UA Adopts A Powerful 8-Pin Ceramic Leadless Chip Carrier (LCC) Package, Which Can Be Directly Connected To Various Microprocessors Through The 12C Bus 1. Pressure Range: 300-1100HPA (Elevation 9000m--500m) 2. Power Supply Voltage: 1.8v-3.6V (VDDA), 1.62v-3.6v (VDDD) 3. Low Power Consumption: 5A, In Standard Mode 4. High Precision: In Low Power Consumption Mode, The Resolution Is 0.06hpa (0.5 Meters) 5. In High Linearity Mode, The Resolution Is 0.03HPA (0.25 Meters) Note:Different Batches May Have Differences In Product Appearance, Color, And Printed Characters, Which Will Not Affect The Use. Colour:As Shown Material:PCB Package Contents: 20 * Sensor Module 20 * Pin Header 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.