Sensitivity：-48±2dB 

Output impedance：≤680Ω 

Directivity：Unidirectional 

RF: 20Hz-20KHz Operation 

Voltage：DC1.5v-10v 

Power supply：DC1.5 V 

Mini operation voltage：1.5V 

Current consumption：≤0.5mA S/N 

ratio：≧58dB