1. Product name: NICEHCK X39 HIFI In-Ear Earphone
2. Brand: NICEHCK
3. Model: X39
5. Impedance: 16Ω
6. Plug type: 3.5mm
7. Color:Black/Silver
8. Earphone sensitivity: 105dB/mW
9. Frequency range: 20-20000Hz
10. Shell material: Aluminum alloy
11. Cable material: Copper color is OFC, silver color is silver plated
12. Drive unit: 6mm Titanium Plated Diaphragm Miniature Dynamic