Features 1、3 HEATING MODES: Electric heating insoles have 3 heating modes, so you can choose between a USB port, power adapter or mobile power to heat the insoles. 2、EASY TO USE: Heating boot insole is easy to use, simply place it in the shoe and connect it to the power source. Allow the heating pad to be clean, make sure it is dry before use. 3、STABLE AND SAFE: Feet warming insoles are made of soft cotton fleece, stable and safe to use, delicate to the touch, warm and breathable, skin friendly and comfortable. 4、APPLICABLE SCENARIOS: Heated shoe insoles are suitable for cold weather projects or winter outdoor sports, such as winter skiing, hunting, camping and horseback riding or everyday life. 5、EXCELLENT GIFT: Electric heated insoles are the ideal gift for men and women, such as your loved ones, parents, friends, elderly, etc. Enjoy the warmth with others. Item Type: Electric Heated Insoles Material: Polyester Fiber Battery Type: Lithium Battery (Shipped With Built In Battery) Rechargeable Battery Capacity: 10000mAh Voltage: 3.7V Package List 2 x Electric Heated Insole 1 x Power Bank 2 x Charging Cable 1 x Instruction Manual