110-220v marked electronics - Confirmation

I know most computers, cellphones, and ipads etc. are already dual voltage (110-220v) and work with a converter.

I've been going around the house checking other pieces (Amazon Echo, our security cameras, things like that) and identifying which items are and are not.

JUST to confirm, if they are marked (110-220v) then all we need is a little converter plug to plug the device into so that it can be plugged into the wall, correct? 

I know not to bring TV's and even though our BluRay player is multi-region, its not (110-220v) so we'll just buy a new one there.

Anyways, just wanted to confirm though that if its marked (110-220v) that all it needs is a converter plug.

I know most computers, cellphones, and ipads etc. are already dual voltage (110-220v) and work with a converter.

I've been going around the house checking other pieces (Amazon Echo, our security cameras, things like that) and identifying which items are and are not.

JUST to confirm, if they are marked (110-220v) then all we need is a little converter plug to plug the device into so that it can be plugged into the wall, correct? 

I know not to bring TV's and even though our BluRay player is multi-region, its not (110-220v) so we'll just buy a new one there.

Anyways, just wanted to confirm though that if its marked (110-220v) that all it needs is a converter plug.

Yup! No transformer needed - just a plug converter/ adapter.

Some appliances (hair dyers mostly) have a switch to flick to put it onto a different voltage.