9767 60DB:

Sensitivit: 60 ± 2dB 

Directivity: Omnidirectional 

Operation Voltage: 2.0V-10V

Impedance: 2.2K ohm 

Frequency: 20-16.000Hz

Size: 9.7mm x 7mm 

6050 52D:

Sensitivity: 56 ± 2dB 

Impedance: 2.2K ohm

Operating voltage: 4.5-10V

Current consumption: 5mA

Frequency: 20-16.000Hz   

Size: 6mm x 5mm