Size: 160*90*35mm Power: 5V (DC) 0.8A Input Power: 5W Lithium Battery: 3.7VDC 1800mAh Charging time: about 3-4 hours, use time: about 2 hours (according to individual strength) Six core technologies: 5-second fast heating, intelligent constant temperature control, and three-speed adjustable vibration. Three-speed adjustable hot compress, built-in battery, wormwood warm palace. Far-infrared physiotherapy, harmless and radiation-free, long-term use can effectively condition the body, care for health, Packing list: 1 piece warm palace belt (other items not included) Size: as shown Note: Due to the problem of taking pictures, there will be color difference, please refer to the actual product. Thank you for understanding