For pain and tense muscles, the low-frequency stimulator is the best choice.

After a day's work, the more physical labor there is, the more tired I feel. In my case, I mainly use a low-frequency stimulator on uncomfortable areas such as the calves and thighs.

After stimulating the shoulders and back of the neck, I can definitely feel the fatigue easing, so I use it frequently. I highly recommend it for health.