Pendant Neck Protector Cervical Spine Cervical Spine Device Shoulder Features: 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 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. switching, the think strength is 1 block. Heating function key Press the heating key, the heating is , the think is 45 °C, and then press the heating key, the rises to 50 °C. Continue to press the heating button, the rises to 55C and then press the heating button to turn off the heating. up/down Each you press the "+" button to increase the by 1 gear, and finally to the 9th gear; Product details: A tingling sensation may be due to: ·Is the electrode pads close to the neck skin? Need to adjust the position to close to the. ·Is the massage too long? It is recommended to press once for 15 minutes, a day ·Is the massage too strong? ·Is the allergic to the electrode pads? Severe allergies require desensitization first · Cold climate, dry skin? Use moistening the with a damp towel. ·Whether there is a wound on the 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, 4. Patients with acute suppurative 6. Patients with metal implants 7. Near the heart of the human body Contains: 1X Neck 1USB