NECK PHYSIOTHERAPY - The far infrared wavelength emitted by the graphene heating film is very similar to our human body, so much so that heat can deeply into tissue, relieve the tense muscles. Therefore, protect your skin from burning , we designed the temperature will not very hot. Using our neck heat pad for one week, 1 hour per day, you will find it great .3-LEVEL TEMPERATURES - 3 stages heating temperatures for your option, ranged from 100.4F to 113F. NOTE: The neck heating pad is NOT rechargeable and need to stay powering when using. .USB POWERED - Just simply plug the USB cord to a power bank, PC or USB adapter (Not included). Enjoying neck physiotherapy to relieve neck pain no matter you are in the office, at home or traveling. .ADJUSTABLE VELCRO STRAP - This neck brace for neck pain employs an integrated Velcro strap to make it properly braces your neck. .SAFE MATERIAL - Our electric heated neck wrap would automatic shut-off after 1 HOUR working. This heated neck support works with low driving voltage so that it can be heated without causing electromagnetic radiation . Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-YJL official store