Five massage modes b Press the mode button for 2 seconds to turn on the power, the power indicator lights up, the think automatic combination mode intensity is 1 gear. Press and hold the mode button for 2 seconds to shut down, and the power indicator will turn off. Click the key/mode key to the mode, the modes are kneading mode, hammering mode, acupuncture mode, massage mode, and automatic combination mode. After switching, the think strength is 1 block. Each time you press the intensity "+" button to increase theintensity by 1 gear, and finally to the 9th gear; Product Description: A tingling sensation may be due to: Is the electrode pads close to the neck skin? Need to adjust the position to make it close to the skin. Is the massage time too long? It is recommended to press once for 15 minutes, a day Is the massage too strong? Is the skin allergic to the electrode pads? Severe allergies require desensitization first Cold climate, dry skin? Use after moistening the skin with a damp towel. Whether there is a wound on the skin surface, do not put the electrode pad on the wound for massage. The use of the following conditions is prohibited 1. Patients with malignant 2. Patients with bleeding tendency 3. Pregnant women, maternity 4. Patients with acute suppurative inflammation 6. Patients with metal implants 7. Near the heart of the human body Delivery Quantity: 1pc Package Contents: Only the above package content, other products are not included. Size: 4.8*4.1*2cm (Reminder: The size is measured manually, please allow 1-2 cm measurement error) Color: green (Due to different monitors and lighting effects, the actual color of the item may be slightly different from the color shown on the picture.)