AWA-39 Universal Stereo Music Earphones. These are in-ear wired buds that emphasize high-fidelity audio and physical sound insulation.
Technical Specifications
Driver: 10mm Dynamic Driver with a Graphene diaphragm, which is designed to provide more detailed, crisp treble and powerful bass.
Frequency Range: 20Hz – 20,000Hz.
Sensitivity (Acuity): 97 \pm 3\text{dB} (This is lower than the AWA-3, suggesting a more balanced, less "aggressive" volume output).
Impedance: 16\Omega \pm 10\% (Lower impedance than most of the others you've shown, meaning they are very efficient and will get plenty of power even from low-output devices).
Wire Length: 120cm (1.2 meters).
Connector: 3.5mm audio interface.
