A:AnswerAll I've understood is "some" 4K players will allow a certain amount of "region changes." I recommend checking how many before doing any changes.
A:AnswerHi Charlie, No, it only supports Region 1 (DVD) and Region A (Blu-ray). You may refer to this link for more information (General):
https://docs.sony.com/release//specs/UBPX700_mksp.pdf
~Ralph
A:AnswerUnder 'Precautions' : Do Not place this player in Vehicles, on Ships or other Vessels. Do Not place player outdoors.
If player is exposed to cold and then warm locations and humidity found in Vehicles, boats, etc...Outdoor locations - Moisture will Condense on the Lenses and not play properly until it dries.