Features: 1. When using the pen you will feel the effect in your hand (there are many acupoints in the hand) as it uses it as a ground pole to complete the circuit. Simply you have to change your grip slightly or grip the device with more of your hand surface to disperse the effect. 2. With frequent use of this electronic back massager you will be able to reduce pain boost your mood relax improve your skin condition and prevent premature aging. A fusion of modern high-quality massage pen good for health promotion. Simple operation easy to carry. Safe and effective with no side effects. 3. Dome-shaped head mainly used for facial muscle repair and health care node-shaped head is specially used for node treatment can be applied to local parts of the body spherical head can quickly relieve pain and work effectively relieve pressure. 4. Safe and effective with no side effects. It works on partial body parts and spheroidal type head applicable for quickly alleviating pain work efficiently to relieve the tension. 5. If you confront any problems about our products please feel free to contact us we are ready to help. We will solve your problems as soon as possible. Specifications: Package Size: 21.5*8*3cm Gross Weight: 78/94g Notice: 1.Actual color may be slightly different from the image due to light effect. 2.Please allow 1-3cm deviation due to manual measurement. includes: 1 *Electronic Acupuncture Pen(1 * AA Battery Not Included) or 1 *Electronic Acupuncture Pen 1 * USB Cable "