Feature: 1. BARCODE REREAD PREVENTION TECHNOLOGY: This 2D barcode scanner use intelligent product detection technology. After scanning the barcode, the product should be completely taken out of the window, and the code will be read a second time after re entering, completely solving the problem of reread misscan 2. FAST AND EFFICIENT: 2D hands free barcode scanner use high frame rate CMOS sensor and custom lens combined with excellent image algorithm to quickly recognize all types of bar codes 3. SELF SENSING SCANNING FREE HANDS: Just put the bar code near the desktop scanning gun, can automatically wake up and read, without key scanning, saving energy and time 4. COMPATIBLE WITH ALL SYSTEMS: 2D QR barcode hands free scanner is plug and play, support for LINUX, for ANDROID, for Windows XP, for WIN 7, for WIN8, for WIN10, for OS X and other operating systems 5. WIDE APPLICATION: Omnidirectional USB wired desktop barcode reader is ideal for supermarkets, malls, bookstores, drug stores, libraries, gift shops, boutiques, sporting goods stores, jewelry stores, multimedia stores, florists and other retail outlets Specification: Item Type: 2D Hands Free Barcode Scanner One Dimension: EAN-8, EAN-13, EAN-13 2 add-on, EAN-13 5 add-on, ISBN, UPC-A, UPC-E, Code 39, Code 39 FulIASCII, Code 93, Code 128, Codabar. Industrial 2 of 5. Interleaved 2 of 5, Matrix 2 of 5, GS1-128, GS1 DataBar (for RSS14), Stacked (GS1 DataBar) Limited, Standard 25, GS1 DataBar Expanded 2D: PDF417, MicroPDF417, MicroQR, Data Matrix, QR Code Image Sensor: 640x480 CMOS System Compatibility: For Linux, for Android, for Windows XP, 7, 8, 10, for OS X Minimum Recognition Accuracy: Code 39 code 4mil Scanning Bar Code Type: Paper, film type one dimensional two dimensional bar code; Mobile phones, tablets and other screens one dimensional two dimensional bar codes Motion Tolerance: 3.2m/s Scanning Mode: Self sensing continuous reading mode. Package List: 1 x Barcode Scanner 1 x User Manual