A. There are three heating sources for the customers: diesel, gas, and electricity. You can choose the best suitable one for you. B. Internal and External with stainless steel, Internal and External with painting board, 32 tray. C. Dial pan optimization; Convection duct optimization; Combustion systems optimization; Key-off and landing lift plate optimization; Holding temperature system optimization; Seal system optimization; Door-open device optimization; Lighting system optimization; Electric control system optimization; Routine maintenance optimization.