because I didn't like this at all and it DEFINITELY isn't worth the price!! It's too thick and awkward to get into all those hard to reach places, at least for me. It did work well for trimming prior to shaving, but if you don't let it get to that point, it's unnecessary anyway. I'm not sure who's going out in a bikini after using this, but it doesn't trim the hairs short enough that I want to see you in a bikini after using it!! Plus, for this price, it should be rechargeable and wet/dry. Save your money. The trimmer attachment on my husbands electric razor works 10 times better.