Speaker: 40mm
Cable length: 1.2M
Frequency range: 20 to 20, 000Hz
Impedance: 300ohm+/-10
Magnet: Ferrite
Voice coil: Copper
Rated power: 1mW
Maximum power: 5mW
Sensitivity: 105+/- 3dB at 1, 000Hz
Channel unbalance: < 3dB
Plug: Two pin plug (single, bending and folding plug are available)