TEC.BEAN Rechargeable 16 Modes Massager

If your reusable Tens unit pads are no longer sticky, there are a few things you can do to keep them in good condition. (1) Use the tens pads on dry, flat areas with no perspiration or oil. If you don't, the pads won't stick. (2) If you wash Tens unit replacement pads under the tap, please let them dry naturally. (3) Make sure your skin is free from any dirt, oil or lotion before you place those pads. (4) Make sure to apply both of latex-free self-adhesive patches to your skin. if you only use one pad, it won’t perform efficiently. 3. In order to avoid battery problem, we will add note in the description: Since this product has a built-in lithium battery, in order to extend the battery life: a. Please turn off the switch in time after use. b. Please use a suitable charger to charge. c. It is highly recommended to recharge this tens unit every 2-3 months.