With the hair remover there are annoying hairs on the collar the hair remover uses a new head with sensa light technology the sensa light head is only activated when it touches your skin once activated a finely crafted oscillating blade moves against a second static blade and removes even the smallest hairs effortlessly thoroughly and absolutely painless the handy device is so small and light that you can take it anywhere the rechargeable lithium ion batteries make it possible to rem