... width: ~10ns 5.Recurrence rate: 1, 2, 3, 4, 5Hz 6.Cooling condition: wind system+closed ... ENTER key on the panel is the preheat button, Below PHOTO 1shows the ENTER key is not ... turn on like PHOTO 2 status during the treatment.3. "+" Button for frequency adjustment, "-" key to energy adjustment ... therapy like spots removal,different kinds of hemorrhoid 3. ance therapy like acne removal scar removal 4 ...