Speakers Horn 3W 4 Ohm Diameter 4CM Mini Amplifier Rubber Gasket Loudspeaker 40MM 3W 4R Power Amplifier Sound Speaker
 
Specifications:
Maximum diameter: 4CM
Magnet position: 2.2CM
Thickness: 2CM
Type: Electric (coil)
Shape: round
Rated power: 3 (W)
Rated impedance: 4 (Ω)
Frequency response: 0.15 ~ 20 (kHz)
Sensitivity: 85 (dB / W)
S / N ratio: 85 ± 3 (dB)
Harmonic distortion: ≤5 (TMD%)