I bought QCY MeloBuds Pro because i made the comparison with my older QCY MeloBuds ANC, and was looking much better, but I am using the QCY MeloBuds Pro and have delay, I hear eco, or my voice twice the person in the other side don't hear me when I am driving or walking even with the canceling noise or wind... besides this the soun is good, but also have a delay, like when I see a video I look the people talking but I her one second after. And other difference that when I bought the first one came with a silicon case to protect the recharge box, in this one don't, i couldn't connect two devices in same time and the last thing the price is they chargeme was differentfron the original on the official site... in resume is a good to hear but I'm not sure if I will by my third one.... waiting a position from the QCY company.
(Sent a picture from both devices the "old" one with the silicon protector and the "new")