The UMAX Astra 3400 offers the speed of USB technology and high resolution for fast, versatile, and high-quality image capture. The Astra 3400 gives you trillions of sharp, vibrant colors. The Astra 3400 features the exclusive Intelligent Imaging Process Engine (IIPE), which automatically optimizes images and text to ensure that you get great results every time you scan. UMAX' exclusive IIPE technology automatically detects if your document or photograph should be color, gray, or black and white; automatically assigns the optimum resolution for scanning; automatically crops your image; automatically rotates the scanned image if it is askew on the scan bed.Featuring fast push-button scanning, the Astra 3400 includes Scan, Copy, Custom (E-mail or OCR), and Power Saving buttons. By combining the push-button functionality and Intelligent Image Process Engine (IIPE) technology, UMAX has provided users with the functionality to scan many types of reflective media with just a push of a button. The Power Saving button allows the user to power-off the scanner's fluorescent lamp without losing the connection to the computer through the USB port. To power back on the scanner's lamp, simply press the Power Saving button a second time. There is no need to refresh your computer since the USB connection through the USB port was maintained.