Product Features: 1.Blue LED 2.Small form factor 3.Excellent image quality 4.Superior ESD resistance 5.Encrypted fingerprint data 6.Latent print rejection 7.Counterfeit finger rejection 8.Rotation invariant 9.Rugged 10.Works well with dry, moist or rough fingerprints 11.Compatible with Windows Vista, XP Professional, 2000 and Windows Server 2000, 2003, 2008 Key Specifications: 1.Pixel resolution: 512 dpi (average x, y over the scan area) 2.Scan capture area: 14.6 mm (nom. width at center) 18.1 mm (nom. length) 3.8-bit grayscale (256 levels of gray) 4.Reader size (approximate): 65 mm x 36 mm x 15.56 mm 5.Compatible with USB 1.0, 1.1 and 2.0 (Full Speed) specifications 6.Indoor, home and office use Package list: 1Xfingerprint reader