Overview：

AIYIMA 25/20/15W Audio Speaker 40/44/50MM Full Range Loudspeaker Resonance Sound Exciter Super Bass Neodymium Portable Speakers

Specification：  

Size: 50 x 30 mm
Impedance/power: 4 Ω, 25 W / 8 Ω, 20 W
Weight: 270 g
Type: electric (moving coil)
Purpose: Amplification
Shape: Round
Composition: Other
Diaphragm material: not paper