Treatments principle of Electronic Acupuncture Pen is used electrical pulses to to stimulate acupuncture points then to activate cell and dredging the channel, while there is a condition to generate the electrical pulse, that is, currents positive and negative poles should be turned on. The pen is a monopole current(the nib) output, so the other pole current should be conducted by hands and form circumfluence with the nid of the Electronic Acupuncture Pen, so that it will produce electrical pulses. So it is normal to feel a little numbness, it is how the meridian pen works, not quality problem.
In the current return process, depending on the size of the hands resistance value, the strength you feel will be a little different. Some people would feel more strong and some will feel weak. Young people or healthy people will feel a little stronger. Elderly or in poor healthy people will feel weak.

Features:
Modern biotechnology and fine quality massage pen are beneficial to healthy promotion.
Electromagnetic therapy does not need to Pierce the skin for acupuncture.
Simple operation, easy to carry, safe and effective, no side effects.
Without piercing the skin to do acupuncture.
Effective for: acute and chronic physical pain, Arthritis, Rheumatism, Osteoporosis, Migraine, Sports injuries, Muscle joint pains.

Specifications:
Main color: silver;
Power: 1.5V;
Pulse frequency: 0.01-300Hz;
Pulse width: 100pS-320pS;
Output amplitude: 500 ;
Battery: 1 AA battery (not included);
Pen length: 160mm;
Pen weight: 74g / 2.4ounce;
Package size: 210 97 40mm / 8.3 3.8 1.6in;
Package weight: 177g / 6.2ounce;

Packing List:
1 Meridian Energy Pen;
4 Pen Tips;
1 User Manual