Features: 1.This heated knee pad is made of diving fabric, light and soft, comfortable to wear, easy to carry, and can be easily put in a box or handbag. 2.Heating function and vibration massage 2 in 1, can be used for knee warmth and hot compress treatment, effectively relieve muscle soreness and relieve knee fatigue. 3.Three-level heating temperature and three-level vibration massage strength can be adjusted to meet the needs of different people and provide you with the most comfortable physical therapy. 4.The heated knee pad can be easily wrapped and locked on your knees and will not slip off easily, eliminating the trouble of holding it with your hands. 5.Built-in 4000amh high-capacity battery, long battery life, allowing you to relax your knees during travel or business trips. 6.The heated knee pads specially designed to care for the knees can provide warm and comfortable care for the elderly, and are the best gifts for parents and elders. Specifications: Material: Diving fabric Color: Black Size: 18 x 23cm Weight: 320g Packing size: 23 x 17.8 x 8cm Battery specification: 114065PL polymer lithium battery 4000mAh/18.5wh Charging time: 1.5 H Battery capacity: 4000mAh Endurance time: massage (highest grade) 8H; heating (highest grade) 3 H; massage and heating (highest grade) 1.5 H Package Included 1 piece/1 pair x Heated knee pad 1 x USB Charging Cable 1 x English User Manual 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-Minnanxin