I should have listened to a previous person who wrote a review advising buying extras as some of them don't work. I only needed 2 and didn't want the extra cost so that's all I bought and one of them was bad. I was able to use a good one and revive one of my old ones. I gave 2 stars instead of 1 because 1 worked. I do not recommend this seller's product. Do yourself a favor and shop elsewhere and save yourself the frustration and extra expense!
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