Larry, If APH is considering a new version of the BookPort, I would like to suggest a small slide switch that might be fit into the depressed area at the top of the unit, maybe between the headphone jack and the usb port or to the right of the usb port that would be a physical cut off switch. The current key lock arrangement is fine when just carrying around the unit in a pocket but if packing in a bag or backpack, the buttons are constantly being pressed, causing the unit to beep frequently and under the right circumstances, the unit could be unlocked and all kinds of havoc caused as buttons were pressed in the bag randomly. Rick