DigitalPersona products utilize optical fingerprint scanning technology for superior image quality and product reliability. A user simply places a finger on the reader window, and the reader quickly and automatically captures and encrypts the fingerprint image before sending it to the DigitalPersona IDentity Engine for verification. U is a USB fingerprint reader designed for use with DigitalPersona business or developer software. Once reported, our staff will be notified and the comment will be reviewed. If you believe this comment is offensive or violates the CNET's Site Terms of Useyou can report it below this will not automatically remove the comment. Click here to review our site terms of use. The posting of advertisements, profanity, or personal attacks is prohibited.