1. Through the low-cycle pulse technique, penetrate 3-5 cm below the skin to open the pain points and meridians and reduce the pain of the cervical spine.2. Constant temperature massage. A hot compress at 42 ° C can relax blood vessels, relax muscles and bones, accelerate blood circulation, and relieve cervical spine pain.3. 3 massage modes and 15 levels of strength adjustment. Acupuncture mode, massage mode, and tapping mode.4. Close regularly. By default, 15 minutes after automatic power off, it is safer and more secure.5. USB charging. 1600mAh battery, rechargeable for 2 hours, massage for 15 minutes every day, lasting about 1 month. Specification:Color: white / pink / dark blue size: 142 * 138 * 60mm / 5.59 * 5.43 * 2.36 "Material: ABS + 304 stainless steel weight: 160 gramsCharging method: USBVoltage parameters: DC5V; 1A; 5 wattsBuilt-in lithium battery capacity: 1600mAhDuration: 15 minutes of massage every day for about 1 month.Mode: Acupuncture mode, massage mode, and tapping mode.