30 PCS USAMS EP-42 3.5mm Plating Metal In-ear Wired Earphone, Length: 1.2m, Test Tube Packaging(Black)

1. Material: aluminum alloy + TPE 2. Speaker diameter: 10mm 3. Applicable equipment: 3.5mm interface equipment 4. Fish-scale headphone cable, anti-adsorption, disperse after a shake 5. Ergonomic design, comfortable to wear 6. One-key switch, simple operation 7. Metal butt plug, sensitive sound transmission without distortion 8. The microphone on the back of the wire controller, sensitive noise reduction radio 9. Speaker sensitivity: 92dB 10. Impedance: 32 ohms 11. Frequency response: 15Hz-20KHz 12. Microphone sensitivity: 43dB