Now you can have perfectly curled lashes in seconds! With this lash curler, there is no pulling, crimping, or damage to your eyelashes or eyelids. It's quick, easy, and absolutely painless. The Heated Eye Lash Curler is battery operated with a temperature-sensitive silicon pad that changes color when it is ready to be used. Safe for use on natural or strip lashes. Not recomended for use on eyelash extensions. Requires 2 "AAA" batteries, not included.