1. Keep your hand warm in the cold of winter.

2. High capacity built-in lithium ion battery providing continued use

3. USB port for charging through your computer or laptop

4. 3 second time power button to prevent accidental powering on or off.

5. Intelligent Temperature control to avoid overheating

6. Vibrating massage function simulated blood circulation to alleviate fatigue

7. Variable temperature setting, High = 113° F, 45° C Low = 104° F, 40° C