As with other reviewers, I can confirm that my box works- however the lid on the box marking "Car In" and "Car Out" are reversed..!!! Once I figured that out, all was good. I fitted a camera to a Sony XAV-AX3005DB head unit in my lad's corsa D. The picture was ok, but suffered with some interference, so I ordered this filter. It connects in between the camera wiring at the boot end and your power source (in this case, the reverse light power source. Once fitted, the picture was considerably improved without any interference.Great item apart from the poor labelling . buyer beware!

L'attention portée au montage est aussi bonne que la pertinence du questionnement qualitatif du commercial qui a composé cette fiche et nous demande d'évaluer la puissance d'aspiration et la luminosité...On met un boîtier cheap au possible autour des quelques composants, y'a des fils qui sortent, on met la signalétique à l'envers et roule. Le out devient in et vice versa, c'est ludique... apparemment ça l'est d'autant plus que pour certains elle est dans le bon sens. C'est mieux pour l'effet de surprise.Au moins le filtre est fonctionnel, c'est déjà ça.

This electronic noise filter arrived in a simple zip lock pouch.Unlike other reviewers the ‘In’ and ‘Out’ wires were not reversed on mine and were the correct way round.Installation is straightforward. You simply connect this filter inline with the power leads going to the camera.It removed some of the noise on my picture but not all of it. This may be because of the way I have my reversing camera wired. It also works as a rear view dash cam so it has a constant feed when the ignition is on. When I engage reverse there is a third wire connected to the reverse lights which brings up the reversing camera on my display. I suspect that noise is also being picked up by the long run of this third trigger cable and I might have to fit another filter on this wire.At only £5.99 this filter is worth a try if you have interference on your reversing camera. It did remove some of the interference on the picture so I’m giving it 4 stars for now and I may adjust this up or down when I fit another filter.

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L'Innfeeltech filtro raddrizzatore funziona bene come da descrizione. Ha migliorato notevolmente la qualità dell'immagine della mia telecamera di retromarcia, eliminando il rumore e le interferenze che prima la rendevano difficile da vedere. Design compatto, costruzione poco robusta, però è facile da installare.