1. Speaker size: 40mm
2. Impedance: about 32ohm
3. Sensitivity: 115+-3db
4. Frequency range: 20Hz-20KHz
5. Microphone size: 4.0x1.5mm
6. Microphone sensitivity: -38+-3db
7. Microphone impedance: about 2.2Kohm
8. Directionality: omnidirectional
9. Cable length: about 2 meters
10. LED working voltage: DC 5V
11. Working current: about 200mA
12. Headphone jack: USB+3.5mm
13. Product size: 22.5x19.3x8.5cm
14. Product weight: 292g