... the scanned data before sending it over the USB interface.4. The products utilize optical fingerprint scanning technology ... security2. Excellent adaption for dry, wet, harsh fingerprint3. USB interface for high speed communication4. Windows98, Me, NT4.0, 2000, ... Technical Information:1. Fingerprint sensor: ZK Sensor2. Resolution: 500DPI3. Image size: 15.4mm*18.0mm4. Interface: USB1.1, compatible with ...