The number of speeds of rotation of the nozzles provided in the mixer / blender.
The presence of several speeds allows you to adjust the operating mode of the device to a particular situation. For example, a liquid omelet can be whipped at high speed, but it is better to choose a slower mode for kneading dough. The more speeds provided in the device, the more versatile it is, the more accurately it can be configured for a specific task. In simple household models, from 3 to 6 settings are usually provided, in the most advanced devices their number can reach two dozen.
The substance that the jar of the countertop blender is made of (refer to "Device type"), or the material of the blender attachment (refer to "Nozzles"). The most widely used materials are:
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Plastic. Plastic is a popular choice for blender jars due to its low cost, lightweight, and sufficient strength for kitchen use. Its transparency allows for easy monitoring of the product being blended. However, plastic is prone to scratching, which can cloud the bowl and reduce the device's appearance. Scratches can occur from everyday use or rough cleaning with abrasive products.
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Glass. Glass blender jars are transparent and allow for easy monitoring of the contents. They are more resistant to scratches than plastic and do not lose transparency during use. Cleaning them harshly does not affect their transparency, and any cloudiness can be easily removed. However, glass is heavier, more expensive than plastic, and is more sensitive to impacts. A glass blender jar can break from a fall that plastic could withstand.
— Metal. Metal blender jars are durable and stylish, often surviving falls without damage. However, they are less convenient than plastic because their opaque walls make it difficult to observe the blending process. Metal is also more expensive than plastic, making it less commonly used, mainly in high-end devices.
