TF2000 - Ultrasonic Presence Sensor - The ComputerProx TF2000 automates the locking of the PC when you step away. The TF2000 uses ultrasound to detect your presence. When you leave the proximity of the PC, the TF2000 automatically locks the system without requiring any effort on your part! ProxMat - Pressure Sensitive USB connected Mat - The ProxMat detects when the user steps off its pressure sensitive surface. The ProxMat sends keystrokes to the workstation to secure or put it into a low power state. DocLok - Wireless Door Sensor - The DocLok senses when a door is opened and automatically locks the workstation. Great for Doctor exam rooms.