Any Alexa device will work in any country as they are all the same, the only problem could be the mains plug and you may need an adapter so it fits.
No idea about New Zealand as Amazon do not have a presence there, the device will work but what you can use it for may be limited.
Bob, thanks for making mention of limitations. Most likely fewer features and functions in AU/NZ than available elsewhere. Compatibility (as mentioned by the OP) and usability may not be the same as found in other Amazon country sites.
Could somebody please tell me if you can purchase alexa or dot in Australia or New Zealand and if so is it compatible in both countries
Following and agreeing with most of the customer posts on this informative threads, the nub of the discussion seems to be what can all these "clever" devices actually do?
We still love our now ancient Blackberry playbook tablet that is the bee's knees - BUT no-one supports it so it's become pretty useless :(
Reading the product data the numerous smart Amazon devices will work totally perfectly. HOWEVER, they may not be supported with clever "skills" and other Smart features that are available in America and/or elsewhere.
You may need to review specific tasks and see if they work well on the amazing Amazon service and/or other services.