Robotic vacuum cleaners offer the convenience of not having to vacuum at all. Just set one on the floor, push the start button, and let the robot do the rest. However, some cheaper (sub $300) machines do not actually “vacuum” at all because they do not have a suction motor. Instead, they have a revolving brush that “sweeps” surface dirt from your carpet or bare floors into a small cup that has to be emptied later on. The name brands and models that actually have a “suction motor” are the models that cost over $1000.
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