1. Material: Zircon
2. Speaker: 8 mm (8 mm NdFeB speaker)
3. Rated input power: 1Mw， Maximum input power: 3mW
4. IMPEDANCE: 16Ω±15%
5. Speaker Sensitivity: 93±3dB (at 1KHz 1mW)
6. Speaker Frequency Response: 20-20K Hz
7. Microphone Sensitivity: -40dB±3dB(1kHz)， 0dB=1V/pa
8. OPERATION TEMPERATURE: -10Celsius --- +55Celsius
