According to a short time given up the ghost

The headphones have the first wobbles for less than 4 months and are therefore no longer usable. Poor workmanship, not recommended. Engage with frequent use better to other products.

From the sound of her definitely not bad, but a brand-name product with 30 retail price, you can expect longer life. I had headphones on a third of the price, which have held for years.

Stay away are, processing technology worth no more than 5-10 goods.