1、Innovative Bone Conduction Technology : For the first time, we have integrated our self developed 10mm bone conduction drivers for bass and midrange frequencies into IEM headphones. The driver is made of copper BC housing and high toughness steel vibration plate, which is secured by low temperature welding and a screw fixture inside the headphone housing by CNC machining to ensure outstanding transmission of bass and midrange frequencies. 2、Direct Sound Transmission: It utilizes its bone conduction ability to vibrate the outside of the headphone housing directly. This method transmits bass and midrange sound directly to the cartilage and surrounding areas of the ear, creating an immersive sound that you can not only hear, but also feel. 3、LCP Diaphragm: At the core is a special LCP composite diaphragm double chamber dynamic driver. This structure provides a wide soundstage with rich brightness and extended treble, while the addition of the coil BC driver enhances the power and softness of the bass and vocals. 4、Material: Sculpted from lightweight and abrasion resistant metal casing and 5 axis CNC aluminum alloy cutting technology. The surface is treated with sandblasting, anodizing and hollow cutting techniques to guarantee durability, abrasion resistant and erosion resistant performance. 5、Cable: The cable is a premium cable made of monocrystalline copper plated silver wire. The cable consists of 392 individual wires that enhance the brightness and richness of the IEM headphones while maintaining accurate control of the sound. Item Type: IEM Headphone Material: Aluminum Alloy, Copper Silver Plated Speaker Diameter: 10mm / 0.39in Impedance: 38 Ω Sensitivity: 113 dB Frequency Response Range: 5-40KHz Pin Type: 0.78mm 2 Pin 2 x IEM Headphone 1 x Storage Bag 1 x Earphone Cable 1 x Instruction Manual 1 x Plastic Box 1 x Brush 18 x Ear Tip 1 x Metal Plate 2 x Ear Plug