The Oster 6640-022 10-speed blender is driven by a 450-watt motor that delivers the power required for heavy blending jobs. A 10-speed selection provides options to suit various blending needs. The pulse feature of the blender further ensures precise blending. The blender has PowerBlend stainless steel blades that can be easily removed for cleaning. The six-cup plastic jar is break-resistant and has a lid with a removable measuring cap. An all-metal drive system ensures added durability.