1. Excellent audio quality.
2. Noise suppression.
3. Double sides' earphone designed.
4. OEM and ODM are welcome.
1. Sensitivity: 58 +/- 3 dB.
2. Card length: 1.2m(4 feet).
3. Connector: 3.5 mm.
4. Cord fastener: included.
5. Voice switch: icluded.
6. Neck strap: (option).
7. Packing: blister.
8. Speaker: 30 mm dynamic type.
9. Impedance: 32 Ohms +/- 10%
10. Sensitivity: 105 +/- 3 dB.
11. Mylar thickness: 9um (option).