This Trimmer Is Suitable For All Age Women's. Rechargeable Battery Installed Already So Just Buy And Start Using It. It Is Advised To Charge It Once Before Use. There Is USB Charging Cable Included With This Package So Get It Recharged Using Any Adapter or Powerbank And Use It. This Trimmer Doesn't Give Any Irritation Or Redness Or Cuts On Skin. Its Very Beautiful In Design And Portable. Easy To Carry With You Anywhere. Useful To Remove The Hairs From Upper Lips, Chin, Cheeks And Face Instantly And Painless How To Use - Before Use Please Make Sure That Trimmer Is Fully Charged And Then Hold The Skin Tight (Very Tight) And Use The Trimmer. You May Have To Apply This More Then Once For Best Result.