Bought for my detector. I usually kept it on a dish rack that didn't cover the back of the detector. As soon as it was placed in this holder, the readings began to fall after 4 hours. I put it back on the easel and the reading went up again. It covers the rear openings of the detector. Additionally, it's made out of very thin, cheap plastic and doesn't even come with wall mounts. I do not recommend.
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