| 摘要 |
<p>The device is of a flat shape and made of metal or a rigid synthetic material. Its surface can be provided with an identification code of the owner either engraved or in shape of a chip or transponder. A unit facilitating the use of a global positioning system can also be included. Extensions and recesses of an appropriate design facilitate the use of the key-fob as a tin or bottle opener. There could also be a mini screwdriver integrated in the shape.</p> |
