A:Answer Ah, that's interesting. After posting the question, i found the instruction manual pdf online and that clearly states that the adaptor is good for 110v-240v so can be used abroad with a local converter, but that 'not all apps are available in all territories'. I also watched a YouTube review that claimed the same thing - that the PSU us dual voltage. On the strength of this I bought 2 speakers in the Black Friday sale - I live in the UK (where we don't have an equivalent device) but am visiting US family over Xmas, so I guess I will find out when I visit in a few weeks. If the power supplies are 110v only, i'll either get a 240v adapter from Amazon in the UK or return them (there's a Best Buy bear where I'm staying at).