1. Long battery life and light weight: The neck massager is composed of 400 mAh rechargeable photosensitive battery. 60 minutes of charging, 120 minutes of use with heating function, and 300 minutes of use without heating function. The neck massager only weighs 0.5 pounds and is very convenient to carry. Let's say goodbye to bulky neck massagers. 2.10 mode, 16 levels of intensity: Press and hold the switch button for 2 seconds to activate. Neck Smart Neck Massager features 10 pulse modes, 16 intensity levels. Its skin-friendly and breathable soft silicone material makes the carotid arteries stress-free. The U-shaped neck wrap fits the skin better and is suitable for different people's neck sizes and neck curves. It is preset to automatically shut off in 15 minutes. Its operation is very safe and can be used with confidence. 3. Relax the neck and relieve pain: Neckology smart neck massager is different from traditional neck massage. It combines modern electronic technology and multiple patents to simulate various massages to achieve deep cervical spine relaxation, which can help relieve your pain, knots and pain. It relieves joint and muscle tension, improves sleep quality, and promotes blood circulation. It can bring relaxation to you and your family. 4. Heating therapy keeps you away from all stress: The smart neck massager has built-in heating function and 107.6°F constant temperature, as comfortable as a hot towel. Soothing heat therapy deeply relaxes your neck muscles, relieving your pain and muscle tension. 5. Warranty Service: We provide 180 days manufacturer warranty. If you have any questions about this iPhone case, please contact us and get a satisfactory solution.