Why is there an obvious electric shock sensation when using PPM3311 Neck Massager?

PPM3311 Neck Massager is an EMS hot massager with 4 massage modes and 12 massage intensity levels for each mode. If you feel an obvious electric shock when using, it may be caused by your dry skin that is not conducive to pulse work, or it may be that you adjust the massage intensity level too high, resulting in uncomfortable massage. Therefore, we recommend that you moisturize skin and lower the massage level properly when using.