ParametersSpeaker Type: 10mm graphene dynamic driverWire: 5N oxygen-free copper (OFC)Sensitivity: 112dB SPL/mWImpedance: 22ΩFrequency Range: 20Hz-20KHzDistortion: <1% 101dB(20upa)Vocal Tract Difference: <1.5dB(at1000Hz)Rated Power: 10 mWLine Length: 120 cmColor: Starry Black What In BoxOS1 Earbuds X 1Ear Tips S/M/L X 3Warranty Card X 1Key Features【HIGH SOUND QUALITY】 Powerful deep bass and crisp clear highs, all come from its graphene diaphragm dynamic driver. Enjoy the stereo, HD, and acoustic sound quality with our earbuds that's perfect for running, jogging, and other sports activities, stage monitoring, everyday use, lets your music drive you to your personal best.【UNIQUE APPEARANCE】Starry black front shell of 3D print diamond shape, lightly transparent with golden slogan "JUNIOR" printed on. All these is to bring you the sense of retro, mystery and nostalgic. Young, infinite!【DLICATE PACKAGING】Little rectangular box, grey and black tone with elaborate graffiti cover the whole box, shimmering golden letters" OPERAFACOTRY" right on the middle. You can smell its delicacy from every inch. You don't even have to wrap it up for gift purpose.【ERGOFIT DESIGN &NOISE ISOLATION】Unique ergonomic comfort-fit design never falls out when running or working out, and efficient noise isolating design reduces up to 90% outside noise giving you superior comfort and performance to enhance your audio experience. 【QUALITY WARRANTY & MONEY BACK GUARANTEE】 1-year warranty, 30 days FREE return. If there are any quality issues, we will refund your money without questions asked. Your 100% satisfaction is our priority.