Mi Robot Vacuum Cleaner models makes you confused?
Amazon.com - Xiaomi Mi Smart Automated Robot Vacuum Cleaner 1st Generation - Robotic Self-Charging, 5200mAh, 1800Pa Suction, App Control, Path Planning Vaccum Sweeper Easy for Hard Floor and Carpet
Amazon.com - Compatible with Xiaomi Mijia 1s 1st SDJQR01RR SDJQR02RR SDJQR03RR Robot Vacuum Cleaner Left and Right Wheel Replacement Accessories (Color : L 1pcs)