Fo :850Hz 20%. Hz
Sensitivity: 98.5 3 dB 0.5W at 5cm ( at 2K Hz.)
Rated Power:0.5W
Max Power :0.8W
Contact type : Golden Terminal Contact Type
Dimension:Φ15 *3.4mmH.(without sponge )

for mobile phone
Plastics front cover, avoid ESD interference