Zipper style earphones - sick of your earphone wires tangling in your bag or pocket? There's zip earphones are the perfect solution- just zip them up when not in use!!! Use the headphones to brighten up any outfit. Frequency range is 2200 hrz.it replace quality with a perfect sound it also provide a best fit with this phone model. Bass boost system is 1100 hr. You can easily feel the uniqueness of this product.