The rf IDEAS Sonar automatically locks a computer when a user steps away, eliminating the need for manual intervention or software installation. It emulates a keyboard to send customizable keystrokes for locking the system and features configurable settings for trigger distance (2-5ft), delays, and user-definable actions. Designed for compatibility with multiple operating systems, the device enhances security and compliance, particularly in regulated environments like healthcare and GDPR-relevant scenarios, by preventing unauthorized access to unattended computers.