【Using Double Electric Pulse Technology】Deeply stimulate acupoints, relieve neck pain, promote blood circulation, so as to achieve sufficient depth of relaxation of neck muscle tension and fatigue 【Three-Level Constant Temperature Hot Compress】Continuous and stable heat penetration into acupoints to dredge blood vessels, with pulse stimulating muscle and joint adjustment function 【USB Powered】This rechargeable neck massager is powered by USB, mini size, soft silicon material, pendant shape and portable, you can easily carry it in your pocket and use it anytime, anywhere 【Four Massage Methods】Four soothing experiences. It can meet the needs of different usage scenarios and different states, making every massage just right 【9 Strength Adjustment】1-3 gears for daily neck maintenance, 4-6 gears for chronic cervical strain, 7-9 gears for neck injury from pillow