Therm-ic THERMIC SPack 1400 B Sock Batteries Compatible with All Thermic Heated Socks Thin Compact Lightweight Easy to Use Batteri

BATTERIES FOR HEATED SOCKS - The S-Pack 1400 B batteries are designed to provide warmth and comfort during cold weather allowing you to stay cozy and comfortable even in the harshest of climates; Great for all who love spending time outdoors during winter | MANUAL HEAT CONTROL - These sock batteries include 3 manually controllable heat settings via power button; An easy-to-use switch allows you to select from three different heat settings ensuring that you can customize the level of warmth to suit your needs | BLUETOOTH HEAT CONTROL - These sock batteries are fitted with Bluetooth technology which allows you to control all 10 heat settings via your smartphone, using the Therm-ic Heat Control Mobile App; Check & adjust the heat setting for your socks in real time | HIGH PERFORMANCE - The S-Pack 1400 B Sock Batteries are compatible with all models of Therm-ic heated socks; They provide consistent heat throughout the day, ensuring that your feet stay warm for up to 16 hours no matter what youre doing | EASY TO USE - These batteries for heated socks are easy to install and use; They are thin, compact and lightweight which makes them easy to carry when youre going on a winter hike; Includes a USB charger; Wall charger NOT included