describe:1. [Fight Cold] Made of carbon fiber heating, the heat quickly spreads throughout your feet and legs within 10 seconds, which can solve the problem of cold feet in cold weather. Perfect for ski adventures, outdoor work, hunting, fishing, running, biking, hiking and more. The perfect gift for parents, family and friends who struggle with cold weather during the winter.2. [Adjustable Temperature] Rechargeable heated insole includes 10m wireless remote control, allowing you to easily adjust the temperature and turn it on or off. 40C/104F to 60C/140F temperature control, 3 levels. Quickly heats up in 10 seconds so your feet don't feel cold. Convenient and easy to use.3. [High Quality Material] The surface layer is velvet and the bottom layer is foam, which is softer and more comfortable. The heating element is made from carbon fiber composite material, which is strong and flexible to avoid damage from walking and repeated bending. Built-in lithium polymer battery and circuit, protected by high-quality plastic shell, can bear about 200kg.4. [Built-in Battery] Equipped with a built-in 2000mAh large-capacity battery to ensure long-lasting heating. On a full charge, the heater can last up to 8 hours! (Dependent on temperature and ambient conditions). Our heated insoles use a Type-C charging port, which is suitable for a variety of electronic product data cables. Relatively speaking, it is quite convenient.5. [Cutable and Washable] The electric insole has a cutting line and can be cut to the size you need, suitable for most shoes. Both men and women can use them. And it's washable, so you don't have to worry about cleaning after long-term use. The front part of the insole can be cleaned with a brush, but please only wipe the battery compartment part. Please do not soak the entire insole in water!Specification:Name: Heated insolesCharging: USB chargingVoltage: 3.7VBattery capacity: 20000mAh per insoleColor: black/red/blueThickness: 17 mm/0.66 inchesHeating material: carbon fiber compositeMaterial Surface material: mesh velvetpacking list:1 pair of insoles1*remote control1*Charging cable1 * Product manualimportant hint:1. About chargingThe power must be turned off and then charged. When charging, the light lights up red. After about 5-6 hours of full charging, the indicator light will turn green.2. About the batteryThe battery can be charged and discharged approximately 500 times. Please turn it off when not in use to save power. When the battery is exhausted, it must be charged within 24 hours, otherwise the battery life will be seriously affected.3. About cleaningThe front end can be washed/scrubbed. But please only scrub the battery connection part and minimize the flushing time. Due to the built-in lithium battery, please do not soak the entire insole in water. Please make sure the insole is completely dry before use.notes:1. Due to different monitors and light effects, the actual color of the item may be slightly different from the color shown on the picture.2. Please allow slight measurement deviation due to manual measurement. Thank you for your understanding.