EASY TO USE You can sew it directly into jackets, vests or other clothing. Or attach it to clothing with pins, very suitable for use in cold weather. PREMUIM QUALITY Usb jacket heater Adopting soft fabric with built in insulation fiber heating material, comfortable and wear-resistant, durable for use. You can directly put it into your jackets, vests and other clothes for warming and heat. USB electric cloth heater is powered by power bank, such as computer, power adapter and so on.(Not included) THREE GEAR SWITCH INSTRUCTIONS Usb powered heater The three gear temperature adjustment is setted according to the temperature usage of the human body. The red, blue and green lights are designed to quickly identify and debug to the appropriate gear temperature FOLDABLE & WATERPROOF Heater Use Foldable and water resistant to a certain degree, heating evenly, good heating efficiency, washable, but do not immerse it in water for long time. USB Electric Cloth Heate Application Area is included clothes, vests, waists, abdomens, pets and so on, can be washed, bent, rubbed, stitched on clothes CONVENIENT TO CARRY Lightweight and portable, convenient to wear with for outdoor camping or other activities on winters. Also applicable to the people who are afraid of coldness, and they will do not fear of winter any more with it