Fingerprint reader of digital persona Product Introduction: The U.are.U4000B is a USB fingerprint sensor designed for use with Digital Personas U.are.U. Applications and developer tools. The user simply places his/her finger on the glowing sensor window, and the device quickly and automatically captures the fingerprint image. Onboard electronics calibrate the device and encrypt the image data before sending it over the USB interface. Digital Persona. products utilize optical fingerprint scanning technology for superior image quality and Product reliability. The u.are.u4000B Sensor and Digital Persona recognition software have an unmatched ability to recognize even the most difficult fingerprints. Technical Specification: Supply Voltage: 5.0V +/- .25V supplied by USB Supply Current scanning: 170 mA (type.) Supply Current idle mode: 120 mA (type.) Supply Current suspend mode: 2 mA (max.) ESD Susceptibility: >15 KV Image data: 8-bit grayscale Temperature, Operating: 5- 35C Humidity, Operating: 20% - 80% non-condensing Temperature, Storage: -10- 60C Humidity, Storage: 20% - 90% non-condensing Standards Compliance: FCC Class B, CE, VCCI Applications for desktop PC security,mobile PCs, Custom applications, home and Office Use.