EMS neck massager: This neck massager with heat adopts EMS double pulse technology, which can wake up our skin vitality and make our tired neck comfortable and relaxed. Helps relieve neck stiffness, fatigue and pain. 4 modes and 9 strength levels: the levels 1-3 are suitable for daily neck care, the levels 4-6 are suitable for chronic cervical strain and the levels 7-9 are suitable for stiff neck injuries. There are 4 mode massage modes, knocking, kneading and squeezing, and can adjust the strength of your massage to your desired level for maximum relaxation. Smart and practical: the portable neck massager has an LED indicator that makes our operation clearer and easier. It has a 15 minute auto-off function that uses it without other noise, and we can use it to massage our arms, thighs, shoulders and neck.