... shorter3. Combine upper tray with mop tray, step lightly and its easy to install4.”Planet Gear Set”, ... move up to down.7. Keep the mop upright in spin d rayer and step the treadle to ... net, seamless, secureNew device, strong,freely control the mop head's humidity, with cleaning, vacuum,water absorption ... quick drying and more secure; New type of mop head design, can be arbitrary 360-degree rotation ...