Feature:1. Safe Low Frequency: Adopt low frequency pulse technology, deep into the muscle bottom, give you a healthy cervical spine.2. Heating: With 42℃ constant temperature hot compress can promote blood circulation, relieve cervical stiffness.3. 3 Temperature Gears: With 3 temperature selection, can adapt to different seasons, which is comfortable for all seasons use.4. 15 Massage Strength: Neck hanging massager simulate the real massage strength, with 15 strength gears adjustment for you to choose.5. Comfortable Use: With skin friendly lanyard material, the neck massager has light body and pendant style, which will make you feel more comfortable to use.Specification:Item Type: Neck Hanging MassagerMaterial: SiliconeApplicable People: Cold neck, long term desk work, head down to play mobile phone easy to cause neck stiffness, pain, clicking, even to dizziness, protrusion of intervertebral disc and other problems. Massage Techniques: Combination mode, Tuina mode, beating mode, scraping mode.15 Gear Strength Applicable Situations:Gear 1 to 5: Daily neck care Gear 6 to 10: Relieve cervical discomfort Gear 11 to 15: Severe cervical strain Tips: Before using the product, please put on the hydrogel pad first. If you do not want to use the hydrogel pad, you can also use a wet towel or wet paper towel to wet the neck and electrode patch before using, which can significantly improve the massage experience.Power Supply: Lithium Battery (Included) Battery Capacity: 400mAh How to Use:Switch Machine: Long press the product host power button for two seconds, the host starts up (hear "beep" sound, blue light on), enter the default mode (combination mode), def