Product Information ModelX1 Wearing styleAround-the-ear wearing Drive unit11mm moving coil unit Frequency20-20000HZ Impedance16 Sensitivity96db Sound channel difference3db Wire material OFC Wire with microphone in-line control Interface type 3 . 5mm gold-plated plug Color blue . black , green , red - High And Low Frequency Separate SoundBreakthrough acoustic structure application , FEDAI X1 making full use of the principle of sound conduction channel , adding slide structure in the front cavity , completely separating the high and low frequency propagation , making the sound more clean without sound staining shocking power straight to the soul - Appearance Upgraded: Simple Stylish Design FEDAI X1 uses Resin inlaid metal technology, Highlight the extraordinary texture. The combination of resin and the wide range of color options display modern and eye-catching, fashionable earphones. Bright streamer, adds luster texture, full of beauty. Suitable for stage, outing, show, and other scenes. - Comfortable Design Comfortable in-ear and ergonomic design dont cause any burden to your ears,FEDAI X1 they can reduce the clunky feel of earphone and increase the comfort of wearing them, comfortable in- ear headphones with a great seal which minimize outside noise so you can hear the beats clearly. - 360degree stereo surround tuningFEDAI X1 360surround tuning from a team of well-known tuners, the sound field is fresh and authentic. Sound performance is more in line with most peoples preferences, loose and natura, balanced and transparent, with more accurate positioning of the human voice - Product Note FEDAI X1 If the size of the earbud tips does not match the size of your ear canals or the headset is not worn properly in your ears, you may not obtain the correct sound qualities or call performance. Change the earbud tips to ones that fit more snugly in your ears