Detect when you leave office and automatically lock computer. Program determines if you are present by testing connection with your bluetooth enabled mobile phone. Immediately after installation you can assign your mobile with BT Watcher, and you can forget about locking screen: BT Watcher will do it every time you will leave the computer's nearby. You can protect BT Watcher by password, which if set, will be needed to deactivate or exit BT Watcher. Program show only small icon in system tray and balloons about important events, so is almost invisible in work. You can also define custom task to fire when BT Watcher lost connection with your mobile.