1. Thermoplastic slow-rebound memory foam earplugs Kria uses high-end memory foam earplugs, which optimizes the targeted physical structure and significantly improves the tooth sound. The slow rebound material improves wearing comfort and brings excellent noise reduction and sound insulation effects. 2. The earphone cover is made of mirror metal material, which has been polished and polished many times with complex processes, and then uses high-level inlay technology with skin-friendly resin cavity design, presenting a high-end and exquisite appearance. 3. The second-generation -10MM moving coil optimizes and upgrades the low frequency again. Currently, this product is equipped with our second-generation -0MM moving coil unit. We redesigned the structure, optimized the magnetic circuit design, and upgraded coil wire. Specifications, and further improve the low-frequency performance of the moving coil. Bring more shocking sound quality experience 4. The coil-iron hybrid acoustic configuration used by Kria to achieve an excellent acoustic listening experience. Krila is a quasi-professional-grade coil iron hybrid configuration. It is an upgrade based on the single dynamic coil configuration. It completely crushes any single dynamic coil earphones in terms of performance parameters and sound quality. Product Description: Model: Krila Wearing : in-ear Plug diameter: 3.5mm Plug type: L-shaped Whether wireless earphones: wired earphones Frequency response range: 20-40000Hz (Hz) Wire length: 1.2 meters (m) Style: simple style Headphone category: HIFI headphones size: cable length 120cm Material: plastic colour: black Package Contents: 1 x wired earphone (with wheat version) 6 x earplugs 1 x English instructions Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.