produit conforme à mes attentes, j'ai pu l'utiliser desuite et il rempli pleinement sa fonction, je le recommande à d'autres acheteurs éventuels.

I bought this for a home automation project for use with the arduino, but it can really work with anything. Sadly, it has very poor documentation from the seller, but these boards are built much the same from most manufacturers and the documentation is easily available.

One thing that I noticed immediately were the isolation slots that were physically cut into the PCB. This is actually a GREAT feature! Since this relay is meant to drive an isolated load, the problem is that dirt or oils on the PCB could allow small amounts of current to leak between your isolated load and your arduino, which would probably kill it. Since there are physical slots cut in the board, current has no chance to flow and your very electrically sensitive Arduino can stay safe while you drive your lamps or motors from the relay side.

It really shows how much they manufacturer cared that they took the extra effort.

If you are confused on how to wire this relay, refer to this website. It has great tips for newbies and a step-to-step guide on how to wire it.
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One thing to note: relays are rated for a certain life cycle. You can drive them up to their rated voltage and amperage and they will work fine, but the lower power you drive with them the longer they will last. If you are planning on driving larger AC ( Alternating Current ) loads (>10 amps), I would recommend using a Solid State Relay.

Now for the full disclosure. I was given this item in order to give an honest review on it. ALL MY REVIEWS ARE 100% honest. If i change my opinion on the product after its been used for a while, I always go back and change my review.