Features:- The cervical spine massager uses a streamlined ring design, which conforms to the physiological curvature of the human cervical spine. Using circular traction, infrared thermal moxibustion and vibration massage. The five-in-one synchronous multi-channel massage forms an effective composite energy field that reaches the deep tissues and bone marrow of the human body.- It can promote the local relaxation of local muscles, achieve swelling, pain relief and fatigue relief. It is suitable for assisting massage of neck pain, shoulder numbness, headache and dizziness caused by spinal diseases.Specifications:Name: Eight -head low-frequency cervical spine massagerColor: WhiteBattery capacity: 1500mAhCharging method: USBRated power: 5WRated voltage: 5VTemperature: 38-42 ° CPulse frequency: 0Hz-1000HzPulse width: 20us ~ 400usSingle-pulse power at maximum output amplitude:> 7uCSingle pulse maximum output energy: ≤300mJ.Maximum output amplitude RMS: ≤25V (50mA).Surface magnetic field strength: ≥0.01TProduct size: 14x15x6.5cm / 5.5x5.9x2.5inch※ Your arrival is my honor, thank you for your trust and support, If you have any questions, feel free to contact us and we will provide you with the best service.