Features: Smart New smart neck massager, compact and lightweight, the same size as earphone, convenient to carry into your pocket, use whatever you need. Neck Massager use massager for 15 minutes every day,release the neck pain. can relax muscle, ease of cervical vertebra pain, relieve fatigue. App Control Easy Operation. all kinds of smartphone can be available (make sure that your smartphone have otg function), no need extra charging, don't worry about battery problem 6 Modes and 8 Speed Available There are 6 modes can choose: Massage, hammering, kneading, scraping, acupuncture, cupping, you can choose what you like. you can adjust the massage speed according to your need, for the user to bring immersive. Widely Used Perfect for Office, Travel, Subway, no limit to any places, and as long as your phone have enough electricity. Specifications: Type: Neck Massager Material: Silicone Gel Quantity: 1pc Color: White Pulse Width: 4-400us+/-20% Voltage：5-100V Current: 3 -60mA Output: DC 5V Length：12.5cm/4.9ft Pad Diameter: 4cm/1.6 inch Net Weight: 25g/0.9oz Packge: 1*Neck Massager 1*User Manual