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usb rechargeable automatic smart robot floor vacuum cleaner household sweeping machine features: the high power dust suction motor strongly adsorbs all kinds of hair, dust and particles. usb rechargeable power supply, one button to open and close, simple operation, easy to use. more energy efficient, can continue working for 1 hour, creating a clean and comfortable home. smart and automatically avoid the obstacles, change direction, fully clean indoor dust. the dust box is detachable, c...