This is the razor I use.

It's a Gillette product. As you can see, Gillette is such a famous brand. Above all, Mr. Son is the model. This I found that they have 3-speed and 5-speed blades. I usually use the 5-speed one, but I ran out of power, so I switched to the 3-speed one. It's great because one use lasts for almost several months.