Dell Inspiron 24 5348 voltage

​Hi, I have a Inspiron 24 5348 that I purchased in Australia. It has been working fine in England (we share similar power 220-240V), but I am about to move to Japan (they use 100V).​

​The manual that I found on the dell website (linked below) lists the Input voltage as 100 VAC–240 VAC and the Input frequency as 50 Hz–60 Hz.​

​Does this simply mean that models sold in different countries will accept different voltage? Or does this mean that, like a laptop, this all-in-one desktop can be used on both voltages and thus will be fine in Japan? ​

​Is there any way to test this without harming my computer?​

​Online manual (not sure if US model only or universal):​
​downloads.dell.com/.../inspiron-23-5348-aio_reference guide_en-us.pdf​