On Amazon.com where you can now buy this 机器人吸尘器
ILIFE A9 Robot Vacuum Cleaner for just $229.99 shipped (regularly $279.99) after you clip the $50 off digital coupon!

This robot vacuum has a 3″ slim body and 14 smart sensors, which map and navigate your home to clean in back and forth route instead of a random pattern. It also avoids repeating or missing some spots! The WI-FI connected app allows you to control and operate the vacuum right from your phone – including scheduling, selecting cleaning modes, tracing working progress and accessories status. The robot vacuum will automatically return to charge when it runs low on power or finishes cleaning.