EVERTOP Automatic Smart Home or Office Robot Vacuum Floor Cleaner,Intelligent Household Sweeper for Pet Hair/dirt/Daily Dust Removal,Powerful Suction Robot Cleaner White Working on Hardwood floor, tiles floor,marbles and granite floor. Anti-fall function to protect itself from 1.97inch above height Two sides corner brush,higher efficiency in cleaning. When should the brush be replaced. It depends on the environment that your cleaner cleans. For environments with a lot of dust or short hair, you should check and clean every time you use in order to avoid any short hair stuck in the brushes or stuck in the connection part between brush and cleaner.t is better to replace the brushes every 1-2 months. Cliff sensor - Cliff sensor detects stairs to avoid falling down. With the help of cliff sensors, it will not fall over stairs. Easy to carry or move it with its handle. Separate dust box design, easy to dump the dust Clearly to show its power capacity percentage and balance time during working.The infrared induction function for wall or furniture to turn direction in advance Please kindly clean the filter often in order to keep good filtration performance. You can purchase these pare parts if you need to exchange them: Filter-B01J762WMQ Side brush-B01J1H7KV4 Model: FD-2RSW(B) Charging Voltage: AC 110-240V (50HZ-60HZ) Battery capacity (mA): NI-MH 10.8V 2100mAh Operating ideal time: 45-60min Capacity (ML): 0.6L Dust Box Capacity AUTO RANDOM Z LINE WALL-SIDE EDGE Cleaning