Item Type: Acupuncture & Moxibustion Therapy Device. 1 Electronic Acupuncture Pen. 1 Acupuncture Point Map. "ON/OFF" knob to around 4 files, then "Sensitivity" spin around to 2, about 2 per second when detecting acoustic hum shall prevail.Due to personal skin and dry humidity weather, "Sensitivity" regulation vary from person to person.
eBay