Feature: 1. You can walk freely when you wear it, wireless protection, charging use, without delaying work and life. 2. Both charging and plugging can be used, two methods are more convenient and three‑layer flame‑retardant liner which means multi‑layer protection, comfortable and safe. 3. Far‑infrared hyperthermia, sensing human body temperature and not overheating or overcooling so that effectively penetrating the human body, constant temperature and comfort. 4. Three‑gears constant temperature adjustment, not easy to burn and when you touch lightly, temperature change instantly enjoying the different feeling of fingertips. 5. Breathable fabric, soft and non‑irritating with T‑shaped hook and loop fasteners , stick firmly that not scratching clothes, and adjustable elasticity breathable elastic band Specification: Item Type: Heating Knee Pad Material: CottonVoltage: 220VBattery Type: Lithium battery(included) Battery Capacity: 3000mAh x 2 3 Gears temperature adjustment:Blue light low temperature: constant temperature 45℃ White light medium temperature: 55℃ Green light high temperature: 65℃ . Package List: 2 x Knee Pad2 x Lithium Batteries1 x Adapter1 x English Manual Note: Dear customer, Please rest assured to buy without worrying about the plug adaption. We will provide an adapter for you according to different country standard and ensures its normal use.