In-Ear Stereo Headphones with TRS 3.5 mm Jack Plug Specifications Type: In-Ear Stereo Headphones Speaker Size: 8 mm Diam. Impedance: 18 Ohm Frequency Response: 20 Hz ~ 20 KHz Maximum Power Input: 8 mW Sensitivity: 96 dB/mW Cord Length: 120 cm Connectors: Audio: Single 3.5 mm TRS Jack Plug