It is easy to buy a blender. The diverse choices only complicate it. To guide you, consider a model function, performance, colour, appearance, and capacity. Select the appropriate blender parallel to your personal needs. Consider how regularly you will use it too.
Basically, there are 2 major blender styles, immersion (handheld) and countertops. An immersion blender is more convenient because it can be used in a bowl or pot. It takes up less space but offers a lower power. Countertop blenders have a better jar capacity and power, but takes up more storage space. There are also portable models available that you can check here https://www.blendblast.com.au/.
Speed is one of the more important factors to consider in a blender. Most blenders only have 1 or 2 speeds. These are often used as professional bar blenders. Other blenders, especially those used in the home, are capable of 16-speed. A blender's power actually depends on the wattage of its motor. Higher wattage produces more power. This is typically 800 watts.
Multi-speed is not so essential. It is more important to have sturdy stainless steel blades. Also, consider a blender jar. These come in various shapes and sizes. In addition to stainless steel, there are blenders that are made from polycarbonate or high-impact plastic and glass.