1 Balanced Armature Driver + 1 Dynamic Driver. This KBEAR KB04 hifi in ear headphone has 2 drivers in each side. Using a high frequency balanced armature driver and a 10mm dynamic driver to represent a deep rumbling bass with low distortion. Durable Metal Shell IEMs. KBEAR KB04 uses the Zinc alloy as the major material to make this earphone more durable than PC material. Utilising manual polishing, mirror effect gives this earphone a fashion tag. Detachable 4 Core Copper 2 Pin Cable. Unlike other traditional wire earphone, This KBEAR KB04 earbuds headphone is equipped with detachable cable, if original cable is broken or want to have a try for upgrade cable, this detachable design would be perfect for you. Ergonomic Wearing Design. Based on the data, this KBEAR monitor has a comfortable wearing design, provides you an enjoyable music time. Pre-shaped earhook enhance the fit and stability. Earphone Specification : 1. Product Name: KB EAR KB04 2. Brand: KB EAR 3. Model: KB04 4. Earphone type: In Ear 5. Impedance: 16Ω±20% 6. Earphone sensitivity: 104db±3db 7. Frequency response range: 20Hz-40KHz 8. Plug Type: 3.5mm L Bending 9. Cable Length: 120±5cm 10. Color: Grey 11. Whether with cable: Yes 12. Earphone connector: 0.78mm Pin connector 13. Whether with mic: With mic 14. Whether can replacement cable: Yes 15. Driver unit: 1BA+1DD