100% brand new and high quality Features:Active Noise Cancellation: Isolate the sound and listen to it, using a dedicated noise reduction chip, through receiving and analyzing the additional noise, the opposite signal is generated in the earphone to cancel it.Shocking Sound Quality Experience: Feel the shocking sound quality experience, can analyze the audio excellently, and present the original sound.Small Enough: Wear it for a day without getting tired, light per ear, in-ear design, no weight-bearing feeling.Fully Optimized Stage Customization Performance: Powerful dual circuit dynamic unfhighly restore the live atmosphere.0.75mm Standard Gold-plated Pin , Support Upgrade To Blue-tooth Earphone. 5N Ofc oxygen-free copper flat cable , effectively extend the service life. Specifications:Earphone type: In-ear Metal EarphonesImpedance: 24Earphone sensitivity: 112dB/mWFrequency range: 10-20000HzInterface: 3.5mmCable Length: 1.250.05mColor: Black/Clear/CyanWhether with cable: YesEarphone interface: 2Pin 0.75mmWhether with mic: OptionalWhether can replacement cable: YesDriver unit: 1 Dynamic,10mm Dual circuit dynamic driveResin inlaid metal processOption Type: Transparent Standard, Transparent with Mic,Transparent Cyan Standard, Transparent Cyan with Mic, Transparent Black Standard, Transparent Black with Mic Note:Please allow 1-2cm errors due to manual measurement,pls make sure that you do not mind before you order. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package Includes:1x KZ Dynamic Hifi Headphone