?? AI-technology: Window Glass Cleaning New Smart Home Robot Cleaner and Control via Smartphone or Remote. House Cleaning Robot works with power cord ONLY ?? Vacuum engine: Washer mop machine with vacuum engine. Held without magnets. Minimum surface size - 15?15 inch. For any glass thickness (3 mm or more) ?? Warning: Do NOT use on frames with non-rectangular (rounded) edges. Robots works with power cord. ?? Warranty: Designed in Taiwan. Smart Window Robot Cleaner HOBOT has One Year Limited Warranty. ?? Laser sensors for detecting the frame and edges of glass. Class I Laser Product (maximum laser output is 0.97 mW)