The thickness is significantly thinner (48% reduction from previous models) and has been renewed to a sharp style that is easy to use. The heat transfer plate adopts the interior to improve the uniformity of the surface temperature, and has been switched between between approximately 154°F (70°C) and approximately 194°F (90°C). The PH-640 (S) is a classic size of 23.6 inches (600 mm) wide. Combined with a width of 35.4 inches (900 mm) PH-940 (S), it can be used flexibly from the main menu to the side menu.