*Free and fun Bluetooth mobile app functionality - control your insoles straight from the comfort of your smartphone
*Battery level and power indicators - no need to worry about how much remaining charge you have
*Fuss-free convenient charging using the micro-USB cable with any existing USB wall plug, PC or laptop port
*Heat output setting temperatures range from 41-50°C
*Battery can last up to 4hrs on a single charge, dependent on heat setting chosen