Wildwood writes: "The product info at Texet is dismal to say the least!". That's a bit unfair since all of their product manuals are online, including the one for the DPF-701 Lifestyle. (That's the only model with 'Lifestyle' in its name, so I'm assuming that it's the correct one):
http://texet.com/tle/.../DPF-701Lifestyle.pdf
The DC output voltage of the power adaptor is shown as '9-12V' (presumably depending upon the AC input voltage, which can be anywhere between 90V and 240V). So the exact supply voltage doesn't seem to be particularly important.
However there are two important caveats. Firstly, the manual doesn't indicate whether the centre pin of the socket is positive or negative. (There's usually a little picture next to the socket, showing which way round the polarity needs to be). Secondly, the power consumption is shown as 10W. Hardly any power adaptors (of the type which come with radios, phone chargers, etc) can handle such a load. Standard 'universal' adaptors can typically only provide around 3.5W. Connecting one to a device which requires a 'heftier' supply will lead to the adaptor rapidly overheating, with a risk of fire and the near certainty of it 'burning out'.
Chris