This is brand Agaro FT2001 Female Groomer

Hi, I can tell you by my personal experience. This is the one I use and it is really awesome. No marketing! I have been using this for a year now.

Hey, you can you a a special razors which comes with soft blades, as the under arm skin is delicate. There are different hair removal cremes which are helpful You can also use a trimmer which might benefit you. It could also happpen that When you use a razor to shave, you cut off hair just below the surface of the skin. Shaving results in unsightly stubble, which gives the illusion that you have darker underarms

Hi, you can if you are comfortable. Else you can even try trimmers or hair removal creams. Check Paree brand. They have razors and hair removers too. I quite like their products.