Features:

• 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
• 6000 mAh capacity offers a category-best 24 hours of constant heating power
• High-performance Lithium-Ion battery with USB recharging cable
• Bootdoc Anatomic insole with pre-installed Heating Element for easy integration into many types of footwear for added support
• 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