Samsung - Super Fast Charging 45W USB Type-C Wall Charger - Black

The specs on the back of charger indicated the Input : 100-240V, so this would work for all voltage 220-240V. I have Note 20 Ultra and purposely bought this charger to use with that phone. It works great and the charging is very fast. S20 Ultra came out about the same time with Note 20 Ultra so I believe the charge will work for this as well. I don't have the tablet S7 so I don't now the exact answer. Hope this helps!

Yes

Yes it does, but it is a very short cable. Samsung got cheap on that point.

Yes this charger is compatible with the Samsung Galaxy S21 5G. Expensive at $50 but WOW charges really really fast. Wish I bought this sooner. Others I had not even worth comparing.

Yes it will fast chager but you wont get to get the full 45 watts out of the charger and you wont get faster charging speeds.