Suction: With a strong suction to quickly clean dust, hair and other debris. Vacuum cleaner: Get a USB robot vacuum cleaner in black or white! Charging time: Charge for three hours for 90 minutes of working time. Anti-collision: Designed to prevent collisions, with a soft bumper to prevent damage. Re-charge: With a rechargeable battery that charges via the included USB cable. Wheels: With 360° universal wheels for more flexible and stable movement. Usb Robot Vacuum Cleaner | Black | Living Social