Classic Seven Driver Units: Equipped with new beryllium-plated dual dynamic drivers and 4BA technology, the NX7 MK4 iem delivers rich mid-low frequencies and exquisite highs, making it one of the best iem earbuds for sound quality. Premium Materials & Elegant Look: Constructed from stabilized wood, resin, aluminum alloy, and PC, the NX7 MK4 iem ear monitor provides warm, rich sound. Its stunning design makes it one of the best in ear monitors for both aesthetics and performance. Ergonomic Design & Soft Cable: The NX7 MK4 wired earbuds feature a lightweight, ergonomic design for a comfortable fit. The soft, tangle-free cable enhances these in ear headphones, perfect for everyday use. Wide Compatibility: The NX7 MK4 wired earphones offer interchangeable cables, including both 3.5mm and 4.4mm balanced options. This versatility makes them ideal for professional musicians and audiophiles alike. Customizable Sound Experience: With replaceable tuning filters in gold, red, and black, the NX7 MK4 allows you to choose between balanced, mid-high, or heavy bass sound profiles, making it a top choice for gamers and music lovers alike. Specifications: 1.Product Name: NICEHCK NX7 MK4 In-Ear Earphones 2.Brand: NICEHCK 3.Model: NX7 MK4 4.Driver: 4 balance armature type drivers + 2 beryllium plated diaphragm dynamic drivers + 7 layer piezoelectric ceramic unit 5.Wearing method: In-ear ear earphones 6.Impedance: 39Ω 7.Sensitivity: 1. Gold filter, 112dB/mW, 2. Red filter, 113dB/mW, 3. Black filter, 110dB/mW. 8.Reproduction frequency band: 20-28kHz 9.Plug: 3.5mm plug or 4.4mm plug 10.Cable length: 1.2m±5cm 11.Cable Material: Silver Plated High Purity Copper Wire and Monocrystalline Copper Wire Mixed Cable