The Thermic S-Pack 1400 Bluetooth battery is the most efficient in the range. It will keep your feet warm for up to 16 hours. And with the Bluetooth technology, you can adjust the heat settings remotely using your smartphone.

Thermic S-Pack 1400 Bluetooth Features: 

• Bluetooth function
• Warm feet for up to 16 hours
• Wall charger not supplied
• S-Pack batteries are suitable for use with the Therm-ic PowerSocks heated socks
•  

BATTERY MAINTENANCE

• Store batteries in a cool place (5 ° / 41 ° F to 20 ° / 68 ° F)
• Batteries must be charged halfway before storage
• Disable batteries before storage
• Clean the batteries with a soft, slightly damp cloth and a mild cleanser

Caution: Before each cleaning, unplug the charger from the outlet.