Relax and regenerate yourself with our snap-on neck massager - perfect for relieving pain, relieving stress and improving posture. Boost your lymphatic drainage and eliminate toxins with our ultrasonic and far infrared technology - perfect for weight loss and body shaping. Our portable neck massager is easy to use and perfect for relaxing on the go - take it with you to work, the gym or on vacation. Improve your overall health and well-being with our neck massager - it increases blood circulation, reduces inflammation and promotes healing. Enjoy a peaceful night's sleep with our continuous all-weather sound action technology - it promotes fat loss and relaxation while protecting your body's vital systems. Material: nylon belt + ABS Power supply method: USB charging Built-in lithium battery: 250mAh Charging time: 2-3 hours. Rated power: 4 W. Waterproof performance: not waterproof.