Perfect for mobile professionals, the Brother DS-820W Wireless Mobile Document Scanner provides versatile scanning performance in a compact package. The DS-820W is truly wireless, thanks to the included rechargeable battery for scanning on the go. You can connect with ease thanks to the choice of either Wi-Fi or via USB, while the ability to scan to a variety of devices included computers, SD cards and email mean you can always save a digital copy or a document when you need to. An interpolated resolution of 1200 x 1200 dots per inch (dpi) or optical resolution of up to 600 x 600 dpi allows for high precision digital reproductions of documents and images, with a fast scan speed of up to 8 pages per minute. With the DS-820W you can easily scan documents, photos, receipts, business and plastic cards and more, from as small as a business card to up to 8.5 x 32 in size.