Features: and Round 2d codes scanner module, barcode or qr code reader, with led indicator, small size, easy to integrate. The Barcode Scanner Module (D) is a round 2D barcode scanner module with LED indicator. highly integrated and compact size, suitable for elevator and other code scanning applications. Adopts advanced image recognition algorithms, easy to decode various 1D or 2D codes. Onboard UART interface, can be easily integrated into kinds of embedded devices. Specifications: Resolution:640 x 480 Scan Angels:horizontal 70, vertical 55, roll 360 Scan Mode:Sensing, Continuous Communication Interface:UART port (9600 8N1 by default) Power Supply:3.3V Current:120mA Working Humidity:5 percent RH - 95 percent RH (non-condensing) Note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: 1Set x Round 2D Codes Scanner Module Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.