Thank you for viewing! This is a new, unused item. It's recommended for keeping your feet warm during this cold season. Includes battery and USB charging cable. Here are the product features for your reference: 【Comfortable Material & Convenience】 The surface is made of crystal microfiber fabric, and the back is made of thick cotton, providing a delicate and soft touch. It has double flame-retardant protection. It's warm and safe. It keeps the warmth in and provides long-lasting insulation. The foot warmer can be used wirelessly, allowing you to move around and walk freely. 【3-Level Temperature Adjustment & Built-in Lithium Battery】 The temperature can be adjusted in 3 levels. You can adjust it to your preferred warmth. High temperature mode is about 60-65℃ (red light on), medium temperature mode is about 50-55℃ (blue light on), and low temperature mode is about 40-45℃ (green light on). With a thoughtful temperature design, you don't have to worry about overheating or overcooling, and you can take care of your feet warmly. This product has a built-in U-shaped 3000mAh lithium battery, which provides constant temperature heating from heel to toe. The heating wire has a wide heat transfer area, warming your feet from the toes to the soles, making your whole body warm. 【30-Second Rapid Heating & Timer Function】 The most distinctive feature of this product's heating core is its high electrical and thermal conductivity, which allows for rapid heating, with the entire surface reaching over 50℃ within 30 seconds of being powered on. The U-shaped heating wire inside the insole heats quickly and evenly within 30 seconds. In addition, this product has a 30-minute automatic timer. Even if you forget to turn it off, it will automatically shut off after 30 minutes of use. It can effectively prevent low-temperature burns, overheating, and fire. It's easy to use for short periods, such as when watching TV or reading. 【Washable & Great for Various Scenes】 It adopts a dark-colored exterior design that is resistant to dirt. The built-in heater can also be removed from the bottom, and the cover can be washed. You can wash it by hand or in a washing machine. It's very convenient. Perfect for cold offices, working from home on the computer, keeping your feet warm while studying, and for protection against air conditioning! It's a great cold-weather item to give as a gift to your parents, friends, or colleagues, as well as for yourself. The electric foot warmer with a 1.2M cord fits well in an office or room. 【Unisex & Service Support】Size 30.5*20*12cm (for 22~26cm), suitable for both men and women.