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usb rechargeable auto cleaning robot smart sweeping robot floor dirt dust vacuum cleaner auto floor cleaning sweeping sweeper features: it easily absorbs dust, hair, paper, and reduce pollution. swept dust and garbage thoroughly! with low noise mute gives you a quiet environment. do not disturb the dream, sleep without worry. it can avoid the obstacles and change direction automatically by inductor. high efficiency and energy saving, long battery life, long-lasting endurance, and can be ...