Xiaomi Robot Vacuum S40 Pro is built for households that want a single device to handle both vacuuming and mopping with minimal daily intervention. It combines powerful 15000Pa suction with a dual spinning mop system that mimics the motion of hand-wiping. The standout feature is its pair of extendable mechanical arms, which push the side brush and mop pad outward to reach corners and edges within millimeters of the wall. With a 5200mAh battery, a 430mL dustbin, and a 310mL water tank, it can cover up to 180 square meters in a single run. Navigation relies on LDS laser mapping combined with a 129° structured-light sensor for obstacle avoidance, while a dual anti-tangle system on the brushes reduces the amount of manual maintenance needed.

Key Features :

• 15000Pa Powerful Suction: Powered by a proprietary high-speed fan with aerospace-grade aluminum-magnesium alloy blades, the S40 Pro achieves a 99% large particle collection rate on hard floors. This level of suction is noticeably stronger than the standard S40's 10000Pa, making it effective against pet hair, fine dust, and everyday debris.
• Extendable Dual Mechanical Arms for Edge Cleaning: When the vacuum detects a corner, the side brush extends outward to reach a 0mm distance from the edge, while the mop pad extends to clean within 1mm of the wall. Together, these arms achieve 100% coverage of corners and edges without needing a second pass. An anti-collision mop pad tray also protects furniture edges during operation.
• Dual Spinning Mop Pads at 180rpm: The two mop pads rotate to replicate a hand-wiping motion for removing stubborn dirt and stains. The water tank offers 3 adjustable flow levels, letting you control how wet the mop pads stay depending on the floor type, which helps minimize water marks.
• Dual Anti-Tangle System: The Y-shaped main roller brush uses bristles designed to block, detangle, and gather hair before it's pulled into the dust box by the 15000Pa suction. The side brush is also anti-tangle, and sealed end caps on the main brush prevent hair from being pulled in from the sides — reducing the frequency of manual cleaning.
• Cleans Up to 180m² in One Run: The 5200mAh battery, combined with a 430mL dustbin and 310mL water tank, allows the S40 Pro to handle larger homes without needing to stop for water refills or frequent dustbin emptying.
• Smart Carpet Detection with Automatic Mop Lift: Ultrasonic sensors detect carpets and automatically raise the mop pads by up to 10mm to keep them dry. Four customizable carpet modes are available: clean carpet first, carpet avoidance, carpet crossing, or ignore carpets entirely — all adjustable per room through the app.
• LDS Laser Navigation with 129° Structured-Light Obstacle Avoidance: A full 360° scan builds an accurate map of the home quickly, and the layout is remembered to avoid repeated mapping. The wide-angle structured-light sensor helps detect low-lying obstacles and navigate precisely, even in low-light conditions.
• Climbs Obstacles Up to 20mm: A smart floating main brush cover automatically adjusts to different floor heights, allowing the vacuum to cross thresholds and low obstacles smoothly without getting stuck.
• Full Control via Xiaomi Home App with Voice Assistant Support: Schedule and start cleaning remotely, set no-go zones, target specific furniture areas (such as around a dining table or pet litter box), monitor remaining cleaning time, and review a cleaning report after each run. The vacuum also supports voice commands through Amazon Alexa and Google Assistant.