Multimedia guide helps tourists track down remains of Berlin ...

The hand-sized minicomputer, to be introduced May 1, is linked to global positioning satellites mapping the wall's former path.

Boasting a headset and a touch-screen, it features a colorful map of the city that can zoom in and out, showing the users where they are. The route of the former barrier between East and West Germany is marked in red while a yellow line guides the visitor from one wall section to the next, calculating the distances via GPS in meters.

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The city government commissioned the multimedia guide as part of a bigger project to improve existing memorials to the wall, most of which were torn down after Communist East Germany collapsed and the border was opened in 1989. The project is scheduled for completion by Aug. 13, 2011, the 50th anniversary of the wall's construction.

Apart from guiding tourists from one wall memorial to the next -- among them the Brandenburg Gate, Checkpoint Charlie and the mural-covered East Side Gallery -- the digital assistant gives information about 22 historically significant spots along the wall's route.

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At a memorial for the people killed while trying to escape, users can click an icon that lets them see and hear Juergen Litfin talk about the death of his brother Guenter -- shot by border guards Aug. 24, 1961 and said to be the first of at least 125 people killed trying to make the perilous crossing.

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Passing through the Brandenburg Gate, users can listen to and watch U.S. President Ronald Reagan peering over the wall as he made his famous 1987 speech challenging then-Soviet leader Mikhail Gorbachev to ''tear down this wall!''

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Starting on May 1, the wall guides can be rented at five booths located throughout the city. They cost between euro6 and euro15 (US$9.50 and US$24) depending on how long visitors want to keep them.

The ''Walk the Wall'' guide comes in German and English, but manufacturer Antenna Audio is planning to offer it in other languages as well.

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It took a team of historians and computer experts one year and euro500,000 (US$797,000) to develop the current software, said Rosemarie Wirthmueller, Antenna Audio's managing director for Europe, but as of now there are no concrete plans to use similar GPS-connected devices in other cities.

Antenna Audio, a subsidiary of Discovery Communications Inc., also offers digital tour guides for 450 museums and archaeological sites across the globe, but none of them come with GPS so far.

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