FiO FA19 / FA-19 / FA 19 10 Knowles Balanced Armature In-Ear Earphone with MMCX Interchangeable 3.5mm/4.4mm
 
Earphones basic specifications
Earphone type: 10 balanced armature earphones
Wearing style: in-ear and around-the-ear
Drivers: Custom Knowles bass BA*2, totaling 4 Knowles
ED mid BA*2 Knowles SWFK treble BA*2, totaling 4
Frequency response: 20Hz-40kHz
Impedance: 100@1kHz
Sensitivity: 106dB/mW@1kHz
Cable: 8 strands totaling 224 high purity pure silver wires
Cable length: about 1.2m
Single unit weight: about 7g (excluding cable)
Earphone connector: expanded MMCX
Audio plugs: straight twist-lock swappable plugs