Features 1. Say goodbye to disposable batteries! Our heated insoles are equipped with rechargeable batteries, providing green warmth. Featuring three adjustable temperature settings, you can enjoy 4-10 hours of comfort with just one charge! 2. Experience fast warmth through cutting-edge electric heating technology! Our insoles can heat up in just 3-5 minutes, providing evenly distributed warmth and keeping your feet warm in the coldest conditions 3. Stay active this winter with our heated insoles! This insole is perfect for skiing, motorcycles, hiking, or leisurely walking, helping to prevent frostbite and ensuring your feet remain comfortable during all outdoor activities. 4. Our heated insoles are designed specifically for multifunctionality! Easily trim them to fit shoe sizes from 35-40 to 41-46 in Europe. The ergonomic design ensures a tight fit, providing warmth and comfort without sacrificing support. 5. The heated insole is equipped with a convenient remote control, allowing you to easily adjust the temperature even when going out. While conquering the cold of winter, enjoy personalized warmth within reach! Specifications: Product Name: Heated insole (remote control) Material: PU foam and velvet Voltage: 3.7V Battery capacity: 2000mAh Charging voltage: 5V 2A Power output efficiency: 298% Overcharge protection voltage: 4.2V Overload protection voltage: 2.85V Communication adapter specifications Charging method: CC/CV Input: AC/100V-230V 40-60Hz Output: 4.2-5V 800mA * 2 Fast charging time: 4 hours Size: Small 35-40 (230mm-265mm), Large 41-46 (271mm-303mm) Expected heating time: High temperature: 55 degrees, usage time: 4 hours Medium temperature: 50 degrees Celsius, usage time: 6 hours Low temperature: 40 degrees Celsius, with a usage time of 9 hours Package Include: Charging cable x1 Remote control x1 Instruction manual X1 Shoe insoles x 1 pair