A 25 minute journey round the central ring tram line, taking in the main sites in the centre of the city including the Rathaus and Hofburg.
A limited commentary gives you some information on the sights you are seeing.
In reality, unless this in part of the inclusive ticket with the hop-on-hop-off bus tours this isn't worth taking as the commentary is so limited. You can do the same journey with a mixture of the number 1 and 2 trams for considerably less.
A limited multi-lingual pre-recorded commentary tells you about some of the sights as you travel round