1)Cooling system: Environment-friendly Peltier cooling. 

2)Hot/cold, on/off switch. Red/green leds indicate warming or cooling

3) Cold effect: Cooling 12-15 degree Celsius below ambient temperature. 

4) Hot effect: Warms to 60-65 degree Celsius by the heater

5)Convenient-plug into any DC 12V.cigarette lighter in car, boat and any AC 100V~120V or 220V~240V safe adapter indoors

6)  Ideal for home, office, car and outdoors

7)Features: 
a )Non-wearing, non-polluting thermoelectric
b ) Heat dissipation to outside by fan with long life brushless motor (30,000hrs)
c ) Convenient plug into any 12V cigarette lighter in car, boat or a standard wall outlet in home, dormitory, office