Voltage: 1 AA battery (not included) Output: 3.7V; 300mA+/-50mA Pulse frequency: 0.01-300Hz Pulse width: 100us-320us Max output size: 500ohm Load voltage: 3.3V Size: 200*30mm Features: Essence of traditional Chinese medicine , promote health; integrate modern biotechnology; do not pierce the skin for acupuncture; simple operation, easy to carry; safe and effective, no side effects; automatic search for acupuncture, it will not work if no acupuncture and meridian blockage is found; transient pulse; precise physical therapy ;Choose and have three main functions: (1) Dome type: Superficial treatment, suitable for health care and facial beauty; (2) Lymph node type: Lymph node treatment, suitable for local pain in the body; (3) Spherical type: Partial treatment , for quick pain relief. Effective treatment of 1. Acute and chronic body pain 2. Arthritis 3. Rheumatism 4. Osteoporosis 5. Sciatica 6. Spondylitis 7. Migraine 8. Sports injuries 9. Muscle and joint pain 10. Back pain 11 .Fibromyalgia package includes: 1 x Meridian Energy Pen 1 x Ball Head 1 x Dome Head 1 x User Manual Note: Please allow 1-3mm errors due to manual measurement. Please make sure you do not mind before bidding.