Cervical Spine, Neck Massager,, Cervical Spine Features: 2 massage heads provide and comfortable massage. Tightly cover the muscles around the cervical spine and areas of pain throughout the body. Instantly releases neck tension in front of a computer or smartphone for countless hours of effective massage. Relieve headaches, chronic fatigue and neck muscle relaxation. Humanized design, adapt to the of human neck, with constant temperature heating function, better massage effect. Enjoy relaxing massage anytime, anywhere, wireless hanging neck, weight, easy to carry, suitable for home, office, business travel and other. Low frequency Electrode, relieve neck pain, and convenient, and portable, automatic power off Product details: Product usage details: 1 Press and hold the power button for 2 seconds to turn the machine on and off 3. Short press the + button to increase the Electrode strength. There are 15 gears in total, and the setting is the first gear at startup. 4. Low frequency Electrode, relieve neck pain, and convenient, and portable, automatic power off 5. The product adopts telescopic strong arm technology, which has good resilience and strong toughness. Easy to charge and long battery life. This product is powered by batteries, (a pair of AAA batteries, not included in the package) Contains: 1 Neck 1 Electrode