Large 13.5mm Stereo Earphones with TRS 3.5 mm Jack Plug Specifications Type: Stereo Earphones Speaker Size: 13.5 mm Diam. Impedance: 32 Ohm Frequency Response: 20 Hz ~ 20 KHz Maximum Power Input: 5 mW Sensitivity: 99 dB/mW Cord Length: 120 cm Connectors: Audio: Single 3.5 mm TRS Jack Plug