Those who have bought an expensive Ultimate Ears product and now is faced with the fact that there is this noise when you connect because the UE earplugs are top products really and just play everything they get also supplied, including noise, you should always between stuck source and earplugs this attenuator in between. It reduces the noise to a minimum to usually not audible and is the explanation for why the UE earplugs are not bent 3.5mm jack plug. Do not make the same mistake I did and do not forget that the attenuator is provided as standard with the more expensive UE products, and you do not need to buy an extra here.
