Xiaomi Robot Vacuum S40 Pro delivers 15,000Pa of suction alongside anti-tangle brushes, with dual mechanical arms that extend outward to reach wall edges and corners with millimeter precision.

A 129° wide-angle sensor handles intelligent obstacle detection, automatically lifting the mop pad when carpet is sensed underfoot. LDS laser navigation builds a 360° map of your home, supporting room-by-room customization, carpet settings, and restricted areas through the Xiaomi Home app, with Alexa and Google Assistant voice control on top. Cleaning modes include Vacuum Before Mopping, Vacuum Only, Mopping Only, and Vacuum and Mopping.

The millimeter-precision extending arms are the feature to focus on if a previous robot vacuum left visible dust along your skirting boards, since that's specifically the gap this design is built to close. It's aimed at buyers upgrading from an older, simpler robot vacuum rather than first-time buyers on a tight budget.