Two different modes can be adjusted as needed.MAX mode is for fast cooling, and ECO mode is energy for saving. With temperature memory function and 3 different levels for battery protection: Low(H1), Med(H2) and High(H3) to protect your vehicle battery without run down. -4°F(-20°C) to 68°F(20°C) powerful chilling performance. Reliable sealing property construction, thick and high Density Foam Insulation.Continues keep cooling performance during your journey.