The pcProx-Sonar solves security risks and privacy concerns with unattended computers without requiring additional software or user action. This solution is a presence detector, not a badge reader. When a user steps away from the computer, the product automatically locks the computer. It detects a users presence so the computer will not lock until the user physically steps away, avoiding awkward time-out settings.The Sonar easily attaches to the PC via a USB port and is configured as a keyboard. The keyboard allows individual keystrokes and delays to be defined by the user. For example, a Windows XP equipped system would send a sequence such as Windows GUI + L to lock the computer when the user walks away.Applications Automatic computer locking, presence detection Inactivity monitoring HIPAA compliance by protecting sensitive data