A mono speaker is built in, and in a stationary vehicle this is perfectly adequate for hearing the TV audio. However, it will be a little quiet at full pelt down a motorway in some vehicles. There is an audio output jack on the V735, but annoyingly it's 2.5mm in size, so regular headphones will require an adapter. Alternatively, the built-in FM transmitter can be used to pipe the sound output to the car stereo for far superior levels of volume. Overall, the V735 is a competent travel television, and there's a remote control in the box, although our early sample didn't include this.
Other than the TV functionality, the V735 has basically the same sat-nav features as the more budget-oriented Navman Spirit 300. It uses the iPhone-alike Spirit interface Mio co-developed with its Navman subsidiary, and fortunately includes the tweaks we first saw in the Spirit 300. So instead of menus that glide around with minds of their own, there are scroll arrows for much more user control. We found the V735 a little more sluggish and picky about where you place your fingers than the 300, but it was still perfectly usable.
Maps of Western Europe are included covering 23 countries. One of the best features introduced with Spirit is keyword searching, so you only need partial address information to find a destination. This is particularly handy if you know the road name but not the exact city or town it's in. But if you do know the full address the usual options are there, including finding a destination by postcode alone.
The V735 also includes the Travel Book added with the first members of the Navman Spirit range. This provides tourist information from WCities. By default, the city guides for London, Paris and Rome are included, but more can be downloaded to the device using the MioMore Desktop 2 PC software. The Travel Book is linked into the POI database, so you can navigate to Travel Book entries, and find detailed descriptions of some POIs.