• 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
• Cambrelle covers for easy integration with all types of insoles, whether preshaped or customized.