The Brother DS640 Compact Mobile Document Scanner is a white unit tested without its original case. It features a high-resolution scanner with a maximum resolution of 600 x 600 DPI, making it ideal for scanning A4-sized documents and papers. With a compact and mobile design, this scanner is perfect for on-the-go scanning tasks. It also includes USB 3.0 connectivity for easy transfer of scanned documents, and has a decent memory capacity of 4 MB. The scanner uses a Contact Image Sensor (CIS) for accurate scanning and has a 48-bit color depth for clear and detailed scans.