Features: 16 units professional Balanced Armature on two side,presenting broad sense of hearing and rich details. Zinc alloy face shell and imported PC resin cavity,precision metal craftsmanship. Humanized upgradable cable design,assemble Bluetooth module,switch to Bluetooth earphone. Comfortable to wear. HD condenser microphone,one-button control easy to master. Specification: Brand: CCA Model: C16 Earphone type: In-ear Impedance: 27Ω Sensitivity: 105dB/mW Frequency response: 20-40000Hz Interface: 3.5mm Cable length: 1.2m±3cm Color: Blue Whether with cable: Yes Whether with mic: Optional Pin type:0.75mm Weight:35±3g