1. Horn diameter: 50mm
2. Impedance: 24ohm+/-15%
3. Sensitivity: 119db+/-3db
4. Frequency: 20-20000Hz
5. Microphone sensitivity: -40db-b+/-3db
6. Microphone impedance: 2.2 kohm
7. Microphone size: 6.0x2.7mm
8. Directionality: omnidirectional
9. Cable length: 2.2+/-0.15m
10. Working current: about 140MA
11. LED operating voltage: DC5C+/-5%
12. Headphone jack: USB+3.5mm