Smart Neck and Spine Massager. Model Number: 813. Voltage: 3.7V. Rated Power: 3W. Charging Input: 5V with 0.5A (charges via USB cable). Net Weight: Approximately 149g (lightweight for easy wear). Box Contents: Massager, charging cable, instruction manual, and aloe vera gel. Benefits of the Device: This type of device typically relies on electrical pulse technology (TENS/EMS) and thermal massage, and its benefits include: Neck Pain Relief: Helps reduce muscle spasms caused by prolonged sitting in front of a computer or phone. Improved Blood Circulation: Heating and pulses help blood flow in the neck and shoulder area. Relaxation: Reduces stress and headaches caused by neck muscle tension. Ease of Use: Its horseshoe shape makes it comfortable to wear while doing other tasks. Usage Tips (for best results): Use Gel: The label indicates the presence of "aloe vera gel" with the device. It is recommended to apply a small amount to the neck area (or wipe the neck with a damp cloth) before use. Treats Neck and Spine Pain Treats Shoulder Pain Improves Blood Circulation Muscle Stimulation Medical Supplies