Ordered 2 packs and the first lasted almost 4 months before it stopped working. We'll see how long the second one lasts. Looking at the reviews it seems like it has 5% one star ratings. Most of them have 8-11% one star ratings, which tells me it's a crappy hunt to get a good rating. I think I'll order another pair as my odds are a bit better with this brand. Unless they are made in the same factory.