gadget to have on hand at all times

as a keychain allows not to miss the door or lock
UV lamp used to check the tickets when in doubt
and the laser can show to a seller on the shelf section that interests us without wasting time
This laser also the joy of my cat that makes hunting antics of the red dot. A crying with laughter as seeing the player.
Compact and multi-use, "gadget" can prevent falls, false tickets scams and allows you to point a detail without the risk of inadvertently destroy something of value (show a statue to his children in a museum without approaching )