Brief: Discover the GROW GM812 Series Barcode Scanner, a high-performance 1D/2D QR barcode reader with USB/UART interface. Perfect for Arduino and Windows, it offers fast scanning speeds and accurate decoding for various barcode types, including PDF417 and QR codes. Choose between GM812-S (5-30cm) and GM812-L (7-50cm) models based on your reading distance needs.