WE're the manufacturer of headphone ,earphone, flash card, MP3/4/5 and web cam.
Speaker Dimension: 30mm
. Impedance: 30Ω
. S.P.Lat: 1KHz . Sensiticity: 105Db
. Frequency response: 20Hz-2000Hz
. Pat power: 100mw
. Power capability: 10000mw
. Plug Type: 3.5mm stereo