Not the cheapest but fast delivery. Product looks authentic. Works as expected
Looks original. Delivery was fast too
Virtual wall is a magnetic tape. Xiaomi robot vacuum works and doesn't fall over the edge anymore. 1 roll is about 2 meters and can be used for maybe 3 door widths.
Genuine Xiaomi MiJia Robot Vacuum Cleaner Accessories / Virtual Wall / Main Brush / Side Brush