This neck massager uses pulses to help relieve stiffness and pain, promote blood circulation, and speed up warm-up and recovery from exercise. It has 3 power modes, delivered through stainless steel nodes, and has additional vibrating gel pads that you can place on your shoulders or upper back. Key Features: Massage your neck and your shoulders on the go, at the office or at home, the Neck Massager is a handy gadget to relax your neck muscles! This device will help you relax , reduce neck and shoulder tension, having a overall therapeutic effect on your body; This neck massager has additional vibrating gel patches that you can place on your shoulders. Using the technology of Electric Pulse Massage, the Battery Operated Pulse Neck Massager uses 3 Power Modes to massage your neck area. Great for relieving muscle pain and promoting blood circulation. Portable electric massager 2 x AAA Battery Powered not included Specifications Pulses frequency: 0Hz - 1000Hz Pulse width:20us -400us Battery Powered Neck Massager Colour: White Powered by: 2xAAA Batteries 2 Gel Pads In the Box Portable Pulse Neck Massager 2 x Pads 1 x Wire 1 x User\'s Manual