1,Simple operation, no need to understand complex recognition algorithm 2,Support the reading of Barcode, QR and other universal one-dimensional codes and two-dimensional codes 3,On-board -USB and UART serial ports can be connected to computers or embedded devices 4,Support the setting of module parameters by scanning the setting code 5,On-board auxiliary , capable of reading in completely dark environment [Self introduction]:I am a barcode QR code scanning and recognition module. I can quickly and accurately read the QR code and QR code on paper or screen through intelligent recognition algorithm. My small size, on-board USB and UART interface, can be directly connected to the computer for use, can also be integrated into various devices. [My Parameters]: Working voltage: 5V Working current: 135mA (), 58mA (standby), 2mA (sleep) Working temperature: 0 C~60 C Working humidity: 5%~95% (non condensing) Communication interface: UART, USB Support one-dimensional code types: Codebar, Code 11, Code 39/Code 93, /, Code 128/EAN128, Interleaved 2 of 5 2 of 5, Code,Industrial 2 of 5,GS1 Databar(RSS) Support QR code types: QR code, Data , PDF417 Auxiliary : white light Reading angle: rotation 360 , tilt 65 , deflection 60 Field of angle: 28 (horizontal), 21.5 (vertical) Product size: 53.3mm x 21.4mm Colour:blue Material:PCB+metal Package Contents: 1 x Barcode Scanner Module 1 x USB cable type A male to -type male 1 x PH2.0 4PIN connection cable 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 a little different from the real thing. The measurement allowed error is +/- 1-3cm.