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After being installed, the product works great. Cards in sensor box were just laying in the case. Someone putting the product together either got in a hurry or just put the parts in the case. After figuring out how they were to be installed, the parts fix reasonably well. My only complaint is that the battery case just lays on top of the cards in the sensor case and will not stay put. I put a piece of styrofoam inside the lid to hold the batteries secure.