1) Frequency Response: 20Hz-20 kHz
2) Speaker Impedance: 32Ω ±15%
3) Speaker Diameter:Φ40mm
4) Rated Power: 25mw
5) Power Handling Capability:50 mw
6) Cable Length: 2.2M
7) Mic.Sensitivity: -55db±2db
8) R.M.S:25mw
9) Plug: Φ3.5mm Stereo,
Earphone in Gray&Blue