Color: Black - Quantity: 1 - Suitable for the people whose shoulder width is about 42cm - Material: High elastic with soft leather cloth / super soft fluff installed self-adhesive cloth nano tourmaline materials 14 permanent magnet pieces - Continuously release far infrared and negative ions when temperature and pressure changes - Bring your body micro-current with a thermoelectric stimulating effect - Improve blood circulation relieve muscle fatigue and promote metabolism activated cell - Easy to use portable. - You can also use it when you are watching TV listening music or doing something else