1x Acupuncture Pen. Size: Approx. 17x2.8x2.8cm. Battery: 1 x AA battery (not included). Effective for relieving acute and chronic physical pain. 1-9 levels of intensity. Fusion of modern biotechnology without piercing the skin to do acupuncture. Simple operation and portable. Safe and effective, with no side effects Acupuncture Pen comes with 1 ball type head and 1 dome type head 100% brand new item.