It does not use batteries but electric power, therefore, it is much more powerful and efficient.
You can adjust it to use it in the speed setting that is most comfortable for your feet for a smooth finish on either soft or hard callus skin.
You will get value for money since it is multifunctional you can use it as a foot callus remover, lady shaver razor or epilator.
It is easy to clean since its main parts are all waterproof so you can just clean it by running it through some water.
It is harmless to the wrist if you intend to use it for long periods thanks to its ergonomic design.
The head is not capable of rotating to over 360 degrees.