Don't buy consumer audio products from Sennheiser. I had the Momentum True Wireless 3, which I had problems with and had to replace several times under warranty. The company acknowledged that there were many problems with this model and promised to fix them in the next model. I recently lost the case for my earbuds and decided to buy Momentum True Wireless 4, but again, I got a defective pair with the same problems as the previous model. I returned them for a refund and decided to try another brand. I bought Technics EAH-AZ100, and it's just fantastic, such a cool product. I'm very happy with it.