Understanding alarm clock description

[ehrenfest]

https://www.amazon.com/dp/B000EX7LNM/?tag=pfamazon01-20

Dual power and dual time features. Our SB200ss clock comes with a 110 volt power supply, will work with 220 volt transformers. Clock also has two switches one allowing user to switch from 50Hz 110 volts to 60Hz 220 volts. This feature keeps proper time with 110 or 220 volts. Another switch allow user to select 12/24 hour time.

Can someone please explain to me what this means? What is "dual power and dual time"? Will it plug into my outlet or not (I have the type of outlet that is ubiquitous in the United States)? What is meant by "keeps proper time with 110 or 220 volts"?

 

[tiny-tim]

Can someone please explain to me what this means? What is "dual power and dual time"? Will it plug into my outlet or not (I have the type of outlet that is ubiquitous in the United States)? What is meant by "keeps proper time with 110 or 220 volts"?

Hi ehrenfest!

It just means that in some countries the mains power supply is 220V instead of 110V, and 60Hz instead of 50Hz.

The different Hz would affect the rate of the clock (so "dual time"), and the different V would damage the thing!

This item has a switch which changes it safely and accurately from one type to the other.

 

[ehrenfest]

Hi ehrenfest!

It just means that in some countries the mains power supply is 220V instead of 110V, and 60Hz instead of 50Hz.

The different Hz would affect the rate of the clock (so "dual time"), and the different V would damage the thing!

This item has a switch which changes it safely and accurately from one type to the other.

I see now! So it has nothing to do with an extra spacetime dimension like I originally thought.