1Multi Function: Has 3 functional modes, can achieve heating, constant temperature, cooling and timing, the machine will automatically shut down when continuously work 12 hours by default, you can set the working time. 2Efficient Cooling: Has large area of heat dissipation aluminum sheet, use same heat dissipation technology as computer CPU, humanized air exhaust on both sides, avoid hot air blowing directly, ensure efficient cooling. 3Large and Even Working Area: With 65mm large diameter working area, TEC sheet and aluminum alloy are seamlessly attached, both cold conduction and heating are uniformly, achieve quick working. 4Wide Compatibility: Compatible with all kinds of flat bottomed water cups, suitable for flat bottomed containers of glass, ceramic, metal, carton, etc. with high temperature resistance and good conductivity. 5Small and Portable: The drink warmer and cooler cup is small and thin, only about 45mm thick, very suitable for daily use, can be placed in the home or office.