GM67 Features: USB wired barcode scanner to capture 1D, 2D code on labels, paper, mobile phone or computer. High-efficiency recognization and high upload speed for improving your working efficiency. With buzzer for reminding you that the scanning successfully or not. Compatible with USB and UART interface. Over 180 configurable options Macro support replace a string in the bar code with another Programmable preamble postamble and termination strings Superior reading performance utilizing advanced decoding algorithms Colour: green Material: pcb Package Contents: 4 x GM67 scanning module 4 x USB cable 4 x Serial port 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 picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.