DIGITSOLE Warm Series Heated Insole

Accurately track steps taken, distanced walked and calories burned
Heats up to 45 degrees C / 113 degrees F, Water Resistant
Up to 8 hours of battery life – depending on usage with fast charging protocol
Compatible with iOS and Android, Bluetooth 4.0 required
In the box: 2 insoles, 1 double micro-USB cable, 1 user manual
Available in sizes from 4-13 Men and 6-11 Women