Model: TE-07A0-K 

Technical Specifications:

Speaker

OD:Φ16mm
Resistance:90Ohm±15% at 1000Hz
Sound Pressure Level:90dB±3dB at 1000Hz
Rated Power:100mW
Max Power:20mW

Microphone

Type: Electret microphone

Sensitivity: -40dB±3dB at 1000Hz (0dB=1V/Pa)

Resistance: 2.2KOhm