Steam deck useable overseas?

I'm planning to go on a holiday in the USA and I've been looking at a steam deck for a while now. When overseas its the perfect chance to get it as it doesn't exist here in New Zealand. If I were to purchase it in the USA will it take a while to arrive and will it work completely fine over here in new zealand?

Edit: Also I'm not using ship anywhere services. It costs roughly $200 NZD ($125 USD)