1. Horn diameter: 50mm
2. Impedance: 32 ohm +/-15%
3. Sensitivity: 96+/-3db
4. Frequency range: 20Hz-15 KHz
5. Microphone size: 6.0x2.7mm
6. Microphone sensitivity: -42+/-3dB
7. Microphone cathodic impedance: less than or equal to 2.2k ohm
8. Directivity: all-round
9. LED working voltage: DC5+-0.25
10. Working current: less than or equal to 40mA
11. Headphone jack: 3.5MM
12. Charging time: 3 hours
13. Battery capacity: 1000MAH