Type:Dynamic Receiver/Speaker 

Dimension:Φ28mm*6.0H

Weight:6.2g

Sound Pressure Level:90±3dB SPL(at 0.1w,0.1m 0.8,1.0,1.2,1.5KHz)

Rated Power Input:Nominal Power:2.0W,Maximum Power:2.5W

Rated Impedance:8±15%Ω

Resonance Frequency:650±20%Hz(at 1.0V)

After sale instructions