Universal traction, electric pulse massage and magnetic therapy effect, suitable for cervical spondylosis. 42°F fever: The advanced sensor built into the neck massager can precisely control the temperature range and avoid excessive heat generation. The massager should be U shaped, and the neck should be designed according to the contour and circle of the neck. In addition, the shoulder strap can be adjusted 360°, so you can adjust it ly. It also helps to stimulate blood circulation, relax local muscles, and eliminate inflammation, swelling and fatigue. Flexible wing design is suitable for different neck sizes. The best choice for gifts: After working hard at home or driving for a long time, you can enjoy in depth massage therapy and enjoy private massage anytime, anywhere. This is a thoughtful gift for a close friend or dear family! How to use: 1. First, long press the power button (the blue light for 3 seconds is power on), and the speed is 0 at this time 2. Then put the massager on the neck, close to the skin, without clothes or hair covering the two electrodes. If the skin is too dry, please moisten the skin with a wet tissue 3. Press the waveform button to increase the intensity, there are 15 intensity levels. Press the power button to decrease the intensity. The lowest level is 0, which means there is no current output. 4. Long press the wave button for 3 seconds to set the mode (the velocity will be reset to zero after switching modes, and the velocity needs to be re adjusted), and long press the power button for 3 seconds to turn off the product (the light is off for shutdown).