Hotronic XLP 2C Bluetooth Custom Footbed Heater

The three constant heat power settings, and the fourth Power Boost setting, can be selected using via the Power button on the battery packs or very conveniently with the HOTRONIC Heat app via a Bluetooth-enabled smartphone The HOTRONIC Heat app provides an overview of the current charge status and heating levels. The app is available free of charge from the App Store and Google Play Store High-performance Lithium-Ion battery BOOTDOC Anatomic insole with pre-installed Heating Element for easy integration into many types of footwear