1. Speaker size: 40mm
2. Impedance: 32ohm+-15%
3. Sensitivity: 115+-3db
4. Frequency range: 20Hz-20KHz
5. Microphone size: 4.0x1.5mm
6. Microphone sensitivity: -38+-3dB
7. Microphone impedance: 2.2Kohm
8. Directionality: omnidirectional
9. Cable length: about 2m
10. LED working voltage: DC 5V
11. Working current: about 100mA
12. Headphone jack: 3.5mm