Food Heated And Keeping Warm: The Electric Lunch Box Is Designed With Dual Modes (Heating And Keeping Warm Mode) And A Digital Display With Touch Buttons For Mode Switching And Time Setting. When Power On, It Is Keep Warm Mode (30 Minutes-4 Hours Adjustable, 6 Levels Setting), Heating Time Is (10 Minutes-50 Minutes, 9 Levels Setting), After The Heating Time Is Finished, It Automati