A barcode reader (or barcode scanner) is an electronic device that can read and output printed barcodes to a computer or mobile. Our Barcode Scanners Ideal for retail stores, the barcode scanner helps you to quickly complete transactions. Connects directly to Oversee POS via USB port which Allows you to easily search and ring up products Barcode Scanner also offers a unique way to download Android applications quickly and easily, using QR codes. These are barcode-style images that you can find on the web, which link to apps in the Android Market. Simply point the camera at the screen and align the QR image, then Barcode Scanner will take you to the app page in the Market where you can download it.