Honestly not recommended. Maybe because the promo price after the pandemic is running out of old stock. At the beginning of the tide, there were no 24 hours of dropping, all knockers, even though they had not been hit by water. The therapist who plugs in is also not reliable, right and left are not the same, then they are complained, insisting they are the same As a result, a week later, reinstall it because of the failed extension claim. After the second installation, there is no difference either, every day there are only 2-5 pieces that fall out. Even though I have followed the procedure for 1 x 24 hours not washing my face. I don't understand anymore, even though this is one of the salons that is a bit pricey for this kind of treatment.