SUPERIOR INTERNAL MATERIAL The internal materials of K3 have been optimized and improved. With the addition of "Graphene Diaphragm", it brings you a more stable voice. Two inside "Armatures" have a better analytical ability on voice. Together they deliver an ambience of music and you will be reluctant to lift down the K3. TRIPLE DRIVERS TO GIVE YOU UNFORGETABLE SOUND AUDBOS K3 earphones have two balanced armatures and a 10mm Graphene Dynamic Driver. Using extreme balanced tuning technology that bring you a spacious and transparent feeling in every moment. ERGONOMIC DESIGN TO MATCH YOUR EARS Based on the ideas of ergonomics, AUDBOS earphones conform to the natural curve of your ears with oblique angles for physical comfort. The snug fit also increases noise isolation, fullness and bass, to bring you a excellent and satisfying listening experience. SPECIFICATIONBrand: AUDBOSSensitivity: 99±2 dBL&R channel balance sensitivity: ≤1 db Frequency response: 20~20000 HzImpedance: 32Ω±15%Max input power: 10 mwEarphone Plug: MMCXWire length: 1.2M / 3.9 footWire material: TPEJack: 3.5mm gold-plated straight insertWARRANTY TERMS: AUDBOS earphones purchased from authorized retailers are covered by a 1-year manufacture warranty.Our company, Grande Technology Co., Ltd. was founded by several music lovers and sound engineers. Our company is established in 2007, and AUDBOS is our brand. We strive hard to achieve excellence, specialize in creating better quality. AUDBOS headphone provides better sound than other similar products. We are not afraid of challenges of innovation; we are in pursuit of customers' expectation of sounds. Working beyond customers' imagination is our goal, and constantly self-transcendence. To bring customers better quality of sounds than you expected. AUDBOS is always good sound.