I've shopped for or helped shop for several pairs of earbuds over the last couple of years for myself or my family, and I'm not sure what that means. I didn't pay any attention to it, but I'm not an audio junkie or anything. If you are looking for something low to midrange in price, check out JLab or JVC. I've had a set of Bluetooth marshmallow buds from JVC for probably 4 or 5 years now, and they have held up really well, and I'm hard on headphones.