The quality surpasses all competitors products from China, the entspechend 3- fold price is justified. The sensors meet the really installed in series sensors and are qualitatively comparable in any way with the cheap Chiateilen. This should have an impact on the service life. The Einbauvorichtungen are well thought out and had good technical. Nothing is simple somehow clamped with a silicone rubber in a hole, like in China competitors. The brackets allow for a correct angle alignment of the sensors. The cables are OEM quality, the plug connections as well, and even that is not with the cheap übehaupt technically inferior and less durable plug connections and cables of Chinese models comparable. The electronics are built clean, fun to look at all that. A calibration and automatic sensor fault monitoring is provided, which is more than just the simple Chinapipser ... But why did I but returned the URF7? The acoustic design is special and in my opinion very bad! Distance appears to 7 LEDs, beginning at about 2m. That's OK. But that only begins at about Pipsen 0,9-0,8m! This means the audible alarm is very very late! This also läßst not change. I talked to the product manager of Bosch. The standard version of 2009 VW puts in a 1,5m with acoustic warning. Within the 80cm distance the acoustic alarm when there is URF7 5 Piepmodi, the gradation is so very fine and probably also works very closely. But even very late. I have no desire for the LED's to look that cheap Chinese models are constructed more simply and beep at 2 to 1.5 meters already, or about twice the Entferung! Bosch there will be no new design, was notified of the market fo quality retrofit systems is simply too small and will get smaller as the Warner are more and more standard even in inexpensive cars. A programming of the acoustic warning distance is not provided. While we rejoice in the German quality made in Spain, I decided for a return. For details on the technical details of the manual page is given in 3-5, there also the calibration is described. The rest of the technical documentation is a disaster. Lauter pictograms that have been painted with little technical expertise of designers who did not know what is important. Important things are small and hard to see! That should have Bosch Remember that is better or at least equivalent to the Chinese models and I know 2 versions sold hundredfold Amazon. Also this feedback I gave the product manager. He said, since just not really do it youself product. A high quality product competitors I do not know, maybe it would not have even the 0.9m restriction in the acoustic warning distance?