Basically ok ...

Installation of the China part is simple, the supplied drill drills clean and properly.
The assembly aid for the sensors in the box, unfortunately missing.
As the sensors were mounted in front, I can with the missing (but described in the instructions) training function, live well-nevertheless the seller should make improvements here.
The wiring is provided with sufficient reserve.
The beeper is very good to hear, the display is quite accurate (continuous at about 20cm distance to the obstacle).
Spare parts supply-big question mark.
After rain and even in the rain often annoys the Pieperei (even if the sensors do not appear to fully water o. Ä. Are) -The installation of a small switch easier on the nerves.
Conclusion: For this price a decent part.
Devaluation there for the defective product description, incomplete delivery, supply of spare parts in question and the rain susceptibility.