1) Frame: Plastic

2) Size: 40 (D) x 7.5mm (H)

3) Usage: Headphone

4) Rated Impedance: 32ohm

5) Rated Power: 30mW

6) Max. Power: 50mW

7) Sound Pressure Level: 118dB

8) Total Harmonic Distortion: Less than 5%

9) Resonant Frequency (Hz): 250Hz

10) Frequency Range (Hz): Fo-10KHz

11) Magnet Size (mm): D12.5*H1.5 mm

12) Voice Coil (mm): D13.4 mm

13) Diaphragm: PET