1. Speaker Size: 40mm 
2. Microphone: 6.0X5.0mm 
3. Directionality: omi-directional 
4. Microphone impedance: 2.2k 
5. Frequency range: 15Hz-20 KHz 
6. LED working voltage: DC5V 
7. Working current: headset Jack: USB+3.5mm 4Pin 
8. Cable length: approx 2.1m 
9. Good quality and long service life 
10. In line with ergonomic design, comfortable to wear