Review on HYS 2.5mm Receiver/Listen ONLY Surveillance Acoustic Tube Earpiece Headset Shoulder with Medium Earmolds (Pair) by Toki Louton

I think the product itself is very convenient. The sound quality is good for the price paid for a double pack. It's hard to beat the price. However, I bought it in mid-October 2018. One of the headphones only lasted two and a half months. I thought c'mon that's why they supply double packaging. I'll just use another headphone, but no. The other earphone was taken straight out of the sealed bag. I think the problem is the dynamics. As already mentioned by another verified buyer, the speaker sounds very quiet or distorted. All connections cleaned and checked for blockages. Either this product is over or I've encountered an inferior batch. I'll wait and see if the seller believes in their product when they send me a new pair. I can no longer buy them monthly. It makes no sense.