Lidar Navigation: The advanced Lidar navigation enables better accuracy, faster mapping, stronger performance in bypassing obstacles, and more efficient route planning. With SLAM navigation, the D9 learns the layout of your home and builds personal smart maps, enabling it to clean and navigate in neat, efficient rows.Powerful Performance: 3000Pa of intense suction picks up dirt and messes easily from the surface and deep within carpet. The strong suction power of D9 robot vacuum can effectively remove hair, dust, and other particles.Multiple Ways to Clean: The vacuum robot has multiples cleaning methods: clean by rooms or cover the whole house, no-go zones to avoid certain area such as a childs playing area, and cleaning twice for a better result.Vacuum and Mop 2-in-1: The robot vacuum chooses from sweeping or mopping. The 5200mAh high capacity battery reaches up to 150 minutes of run-time, which is enough to clean up to 2153ft at low power in one charge.Smart App Control: App remote control allows you to adjust suction power, water distribution, and check the battery level. Once connected to Echo Dot, the robot responds to your voice orders immediately. With OTA upgrading, the 3-floor Map Memory function has published. Note: We offer a 1-year warranty for Dreametech D9.