I received Electric Nail Care System, in exchange for honest review from Tomoson. The system comes with the nail care device and 3 heads (pink, grey, and green). The system does not come with batteries (2 AAs needed). The grey head is for grinding. The green is for sharpening, and the pink is for polishing. I used the green to remove a few sharp edges from my nails.
The speed is a bit slower than other buffers used in the past but I don't mind.
Next, the system has two on buttons--one for left handers and one for right handers, with the off button in the middle. On the bottom of the buffer is the speed button. Hi and low.
You can purchase the nail care system using the link above. The system is prime-eligible