Product Specifications 

• frequency range: 20Hz —- 20KHz
• driving coil/diameter: ∅ 50mm
• cable: 2.2m (rubber cable)
• rated sensitivity: 99dB±3dB
• unbalanced degree: ≤3dB
• impedance: 20Ω
• speaker diameter: 50mm
• interface: 3.5mm jack
• maximum power: 30mW
• compatibility: PCs, laptops and other devices with 3.5mm audio output