Fangrui Product Details Features: 1. Qr Code Scanner Module, Qr Code Recognition, Mini Size, Screen Scanner 2. Barcode Scanner Module(d) Is A Highly-integrated, Small-sized Circular Qr Code Scanner Module With Circular Led Display, Suitable For Elevator And Other Code Scanning Application Scenarios. 3. The Module Adopts Advanced Image Recognition Algorithms And Can Easily Read All Kinds Of 1d And 2d Barcodes. 4. The On-board Uart Interface Makes It Easy To Integrate Into Embedded Devices. 5. Professional Installation Is Required To Avoid Product Damage. Description: 1. Resolution: 640 X 480 2. Scanning Angle: Horizontal 70, Vertical 55, Rotation 360 3. Scanning Mode: Induction Scanning, Continuous Scanning 4. Accuracy: 1d Code 5mil; Qd Code 0mil 5. Communication Interface: Uart Serial Port (default 96008n1) 6. Led Light: Blue: Scanning Code; Green: Decoding Successful 7. Working Voltage: 3.3v 8. Working Current: 120ma 9. Electrostatic Protection: Contact Discharge Soil 6kv, Air Discharge 12kv 10. Ip Protection: Front Ip5