Important Product Information: This device features a "screen lock" feature. This is a standard feature on all nüvi 2x5 and 7x5 Garmin units. If you slide the "Power" key to the right, it will lock the screen and prevent any accidental touches. Once the screen lock feature is engaged, the screen will go black/gray after about 15 seconds to save power on the device. To unlock the screen, just slide the "Power" key to the center position. This feature is really targeted for "Pedestrian" mode so that a user can put the device in his or her pocket/purse and quickly unlock the screen instead of powering on/off continuously. For more information, see page 5 of the product manual.