Yosoo Waist Hot and Cold Therapy Heating Belt for Waist Pain Relief and Back Warmer Built with heat therapy pad inside, which helps to soothe the pain of waist and back and relax the stiff, tense sore muscles around the waist. It could also stimulates blood flow and improves circulation to reduce stiffness in painful muscles Come with 1M USB cord, it could be charged with portable power bank(Not Included). For people who works before PC every day, it could be charged by attach the USB port to the computer Input: 5V 1A; Temperature range: 40-45Celsius; Size: 115CM, fits waist circumference around 45CM-100CM. Heating pad Size: 19CM*10CM Built with a net pocket for ice bags, it could be also used for cold therapy It is washable, but please make sure it was completely dried before you use it again