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What to Look For in a Robot Vacuum Depending on the budget you have You can purchase a robot vacuum with or without all the bells and whistles. Look for models that can clean a variety of floors. You may also think about buying one that has a self-empty dock. The lower-cost models typically have basic bump systems that are slow and inefficient. The higher-end models have sensors to map out your home and navigate around furniture and other obstacles. Features Robot vacuums can aid you in cleaning your home