TEEMI QR Barcode Scanner Handheld Automatic USB Wired 1D 2D bar Codes Imager with USB Cable for Mobile Payment Computer Screen Scan Support Mac OS PLUG-AND-PLAY: Just plug into a standard USB port and start your scan, no drivers required, no need battery; works with Windows, Linux and Mac OS systems READS BARCODES ON VARIOUS MEDIA: Easily capture all common bar codes (1D, 2D and PDF417) on labels as well as on mobile phone displays. With this 2D scanner, you will be ready for the coming mobile barcodes revolution TWO SCANNING MODE: trigger scan mode and presentation mode. Under presentation mode, you dont need to press the trigger to scan DURABLE: Withstands 50 times 1.6m to concrete and 10Gs 0.06" double amp. It's very durable and good quality CMOS IMAGING SCANNING TECHNOLOGY: with advanced digital image acquisition function, it can identify screen code, incomplete code and fuzzy code etc <span class="a-text-bold">Adding characters, numbers</span> before and after each scan. <span class="a-text-bold">Mute the scanner</span> if your working environment is quite and you don&#039;t want to disturb others You can apply <span class="a-text-bold">Enter or tab </span>command keyas suffix after each scan. If you have other special customization which you cannot find in the manual, please kindly contact TEEMI.