Scanner type: Flatbed scanner 1200 x 1200 DPI Colour scanning Duplex scanning A4 Maximum scan size: 210 x 3048 mm Sensor type: CIS USB port Wi-Fi Ethernet LAN Power supply type: AC Scanning noise level: 55 dB Intelligent featuresSmart colour and image adjustments, including auto crop, skew correction, blank page and background removal, with Epson's Image Processing Technology. With long document mode it's possible scan over three metres (3048mm) of paper single sided.Flexible placementThe Wi-Fi and Wi-Fi Direct connectivity on the DS-1660W provide extra convenience to organisations wanting to deploy a dedicated scanning solution that can be accessed easily by many people. With NFC enabled, use the Epson Scan App to take control with your mobile device - then edit and improve digital images before saving and sharing.Boost your office efficiencyOne of the fastest scanners in its class with a 25ppm scan speed. USB 3.0 connectivity means there is no slow down, even when scanning at 300dpi