It is a USB fingerprint reader, the user simply places his or her finger on the glowing reader window, and the reader quickly and automatically scans the fingerprint. On-board electronics calibrate the reader and encrypt the scanned data before sending it over the USB interface. The HF-5000 Reader and fingerprint recognition engine have an unmatched ability to authenticate even the most difficult fingerprints. Applications desktop PC security, mobile PCS, custom applications, home and office use. Features: @ Small form factor @ Excellent scan quality @ Encrypted fingerprint data @ Latent print rejection @ Counterfeit finger rejection @ Rotation invariant @ Rugged @ Works well with dry, moist, or rough fingerprints @ Compatible with Windows. XP, 2000, Me, 98, NT. 4.0 and Windows Server 2000, 2003 ,Vista Key Specifications: @ Pixel resolution: 512 dpi (average x, y over the field) @ Scan capture area: 15 mm (nom. Width at center), 20 mm (nom. Length) @ 8-bit grayscale (256 levels of gray) @ Reader size (approximate): 63 mm x 39 mm x 9.1 mm @ Compatible with USB 1.0, 1.1 and 2.0 (Full Speed) specifications @ Supply Voltage: 5.0V =>5% supplied by USB @ Supply Current - scanning 190 mA (Typical) @ Supply Current - idle mode 140 mA (Typical) @ Supply Current - suspend mode 1.5 mA (Maximum) @ ESD Susceptibility >15 kV, mounted in case @ Temperature, Operating: 0- 40 centidegree @ Humidity, Operating: 20% - 80% non-condensing @ Temperature, Storage: ~10~ 60 centidegree @ Humidity, Storage: 20% ~90% non-condensing @ Scan data: 8-bit grayscale @ Standards Compliance: FCC Class B, CE, ICES, BSMI, MIC, USB, WHQL