Scan faster with an AC adapter from Ambir Technology. Designed exclusively for our duplex document and card scanners, the AC adapter plugs into the ImageScan Pro 490i, DS487, or DS687 allowing you to power the scanner through an AC outlet. This direct power connection lets you scan faster, saving you time and increasing efficiency.The AC adapter''s direct power also helps when using a USB hub or switch. Some hubs and switches cannot supply the necessary power to the scanner. With an Ambir AC adapter, you get a reliable source of power for uninterrupted scanning.The AC adapter comes with 2 interchangeable faceplates for use in Europe and the United Kingdom. To switch, simply push the release button with the tip of a pen and slide the faceplate out.